Institute for Transport Studies (ITS)

Staff photo

Professor Stephane Hess

Professor of Choice Modelling / Director of the Choice Modelling Centre (CMC)

Honorary Professor, Institute of Transport and Logistics Studies, University of Sydney

Affiliated Professor of Demand Analysis, KTH Royal Institute of Technology, Stockholm

Phone: +44 (0)113 34 36611
Room: 2.07
Email: s.hess@its.leeds.ac.uk_
Research Group: Choice Modelling

Link to personal website (with full CV and downloads for all journal papers)

Key Research Interests

  • Advanced discrete choice models
  • Data for choice modelling
  • Heterogeneity in preferences
  • Travel behaviour research

Current positions

  • 05/2014 - present: Director of the Choice Modelling Centre (CMC), University of Leeds
  • 10/2012 - present: Professor of Choice Modelling, Institute for Transport Studies, University of Leeds
  • 05/2011 - present: Honorary Professor, Institute of Transport and Logistics Studies, University of Sydney
  • 04/2014 - present: Affiliated Professor in Demand Analysis, KTH Royal Institute of Technology in Stockholm
  • 05/2014 - present: Director, RSG inc, www.rsginc.com

Past positions (selection - see CV for full list)

  • 03/2010 - 10/2012: Reader in Choice Modelling, Institute for Transport Studies, University of Leeds
  • 05/2008 – 03/2010: Principal Research Fellow, Institute for Transport Studies, University of Leeds
  • 12/2006 – 12/2007: Research Fellow, Centre for Transport Studies, Imperial College London
  • 01/2006 – 12/2007: Senior Researcher, Institute for Traffic Planning and Transport Systems, Swiss Federal Institute of Technology Zurich (ETH)

Education

  • PhD, “Advanced discrete choice models with applications to transport demand”, Imperial College London, Centre for Transport Studies, September 2005
  • MPhil in Statistical Science, University of Cambridge, Queens' College & Statistical Laboratory, July 2002

Professional Engagements (selection - see CV for full list)

  • Editor-in-chief (founding) of the Journal of Choice Modelling (http://www.journals.elsevier.com/journal-of-choice-modelling/)
  • Founding chair of the International Choice Modelling Conference series (www.icmconference.org.uk)
  • Member of the Editorial Advisory Board (EBA) of Transportation Research B
  • Member of the Editorial Advisory Board (EBA) of Transportation
  • Member of the Transportation Demand Forecasting committee, TRB
  • Member of the Travel Behaviour and Values committee, TRB

Awards, prizes & fellowships (see CV for full list, including awards to students)

  • January 2014, Outstanding Young Member of the Transportation Research Board (TRB), For exceptional achievements in transportation research, policy, or practice and service to TRB, Transportation Research Board of North America
  • October 2010: Fred Burggraf Award for excellence in transportation research by researchers 35 years of age or younger (with James Fox), Transportation Research Board
  • October 2008: Leverhulme Early Career Fellowship, Leverhulme Trust
  • August 2006: Eric Pas prize for the best PhD thesis in the field of Travel Behaviour Research, International Association for Travel Behaviour Research

Stephane's area of work is the analysis of human decision using advanced discrete choice models. He is active in the fields of transport, health and environmental economics, and has made contributions to the state of the art in the specification, estimation and interpretation of such models, notably in a valuation of travel time context, where has led the modelling on the most recent UK and German national studies, as well as the reestimation of the Swiss study.

He has published widely (over 70 peer reviewed journal papers in the last 10 years) and has been involved as a principal or co-investigator in academic projects with a combined income generation of over £8.5M.

In his current work, he is looking at bridging the gap between behavioural science and mathematical modelling of human decision making.

His contributions have been recognised for example by the 2014 Outstanding Young Member of the Transportation Research Board (TRB) award for exceptional achievements in transportation research, policy, the 2010 Fred Burggraf award handed out by the Transportation Research Board, the 2005 Eric Pas award for the best PhD thesis in the area of travel behaviour modelling, and the 2004 Neil Mansfield award handed out by the Association for European Transport.

He is also the founding editor in chief of the Journal of Choice Modelling and the founder and steering committee chair of the International Choice Modelling Conference.

Teaching in Leeds

TRAN5282: Masters module on "Choice modelling and stated preference survey design"

Teaching outside of Leeds

Taught on courses on choice modelling and survey design at Imperial College London, ETH Zurich, Tainan University and the University of Cape Town as well as a large number of commercial courses.

Papers

Books

  • (2013) Choice Modelling: the state-of-the-art and the state-of-practice, Edward Elgar publishers.

Book Chapters

  • Hess S (2014) Latent class structures: Taste heterogeneity and beyond, Handbook of Choice Modelling, pp.311-329. doi: 10.4337/9781781003152.00021
  • Marsden G; Hess S (2012) The scope for and potential impacts of the adoption of electric vehicles in uk surface transport, The Future of Electricity Demand: Customers, Citizens and Loads, pp.212-228. doi: 10.1017/CBO9780511996191.013
  • Hess S; Polak JW (2010) Airport choice behaviour: findings from three separate studies, In: Forsyth P; Gillen D; M ller J; Niemeier H-M (Ed) Airport Competition: The European Experience, Ashgate, Aldershot, pp.177-196-177-196.
  • Abou-Zeid M; Ben-Akiva M; Bierlaire M; Choudhury C; Hess S (2010) Attitudes and Value of Time Heterogeneity, In: Van de Voorde E; Vanelslander T (Ed) Applied Transport Economics - A Management and Policy Perspective, De Boeck Publishing, pp.523-545-523-545.
  • Campbell D; Hess S; Scarpa R; Rose JM (2010) Accommodating Coefficient Outliers in Discrete Choice Modelling: A Comparison of Discrete and Continuous Mixing Approaches, In: Hess S; Daly AJ (Ed) Choice Modelling: the state-of-the-art and the state-of-practice; Proceedings from the Inaugural International Choice Modelling Conference, Emerald, Bingley, pp.331-352-331-352.
  • Chintakayala PK; Hess S; Rose JM; Wardman MR (2010) Effects of Stated Choice Design Dimensions on Model Estimates, In: Hess S; Daly AJ (Ed) Choice Modelling: the state-of-the-art and the state-of-practice; Proceedings from the Inaugural International Choice Modelling Conference, Emerald, Bingley, pp.195-216-195-216.
  • Hess S (2010) Modelling air travel choice behaviour, In: Forsyth P; Gillen D; M ller J; Niemeier H-M (Ed) Airport Competition: The European Experience, Ashgate, Aldershot, pp.151-176-151-176.
  • Hess S (2010) Theory and practice in modelling air travel choice behaviour, In: Postorino MN (Ed) Regional airport development, Wessex Institute of Technology Press, Southampton, pp.109-126-109-126.
  • Hess S; Polak JW (2009) Mixed Logit Modelling of Parking Type Choice Behaviour, In: Sloboda B (Ed) Transportation Statistics, J.D. Ross Publishing, pp.77-102-77-102.
  • Hess S; Polak JW; Bierlaire M (2005) Functional approximations to alternative-specific constants in time-period choice-modelling, In: Mahmassani HS (Ed) Transportation and Traffic Theory: Flow, Dynamics and Human Interaction, Proceedings of the 16th International Symposium on Transportation and Traffic Theory, Elsevier, Amsterdam, pp.545-564-545-564.
  • Hess S; Bierlaire M; Polak JW (2005) Capturing taste heterogeneity and correlation structure with Mixed GEV models, In: Scarpa R; Alberini A (Ed) Applications of Simulation Methods in Environmental and Resource Economics, Springer Publisher, Dordrecht, The Netherlands, pp.55-76-55-76.

Reports

Conference Papers

  • Nadudvari T; Liu R; Hess S (2015) Modelling passengers' route choice behaviour on the London Underground, .
  • Fu Q; Liu R; Hess S (2014) A Bayesian modelling framework for individual passengers� probabilistic route choices: A case study on the London Underground, 93rd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Shires J; Jopson A (2013) Accommodating underlying pro-environmental attitudes in a rail travel context: Application of a latent variable latent class specification, Transportation Research Part D: Transport and Environment 25, pp.42-48. doi: 10.1016/j.trd.2013.07.003
  • Hess S; Hensher DA (2013) Making use of respondent reported processing information to understand attribute importance: A latent variable scaling approach, Transportation 40, pp.397-412. doi: 10.1007/s11116-012-9420-y
  • Hess S; Rose JM (2012) Can scale and coefficient heterogeneity be separated in random coefficients models?, Transportation 39, pp.1225-1239. doi: 10.1007/s11116-012-9394-9
  • Fu Q; Liu R; Hess S (2012) A review on transit assignment modelling approaches to congested networks: a new perspective, PROCEEDINGS OF EWGT 2012 - 15TH MEETING OF THE EURO WORKING GROUP ON TRANSPORTATION 54, pp.1145-1155. doi: 10.1016/j.sbspro.2012.09.829
  • Fu Q; Liu R; Hess S (2012) On considering journey time variability and passengers’ path choice: An empirical study using Oyster card data on the London Underground, 5th International Symposium on Transportation Network Reliability, Hong Kong .
  • Hess S; Marsden G; Shires J; Jopson A; Muir H (2010) Analysing rail travellers' desire for reducing carbon emissions from personal travel, Transportation Research Board 89th Annual Meeting .
  • Hess S; Ryley T; Davison L; Adler T (2010) Improving Quality of Demand Forecasts Through Cross-Nested Logit: Stated-Choice Case Study of Airport, Airline, and Access Mode Choice, 89th Annual Meeting of the Transportation Research Board .
  • Fox J; Hess S (2010) Review of Evidence for Temporal Transferability of Mode-Destination Models, 89th Annual Meeting of the Transportation Research Board .
  • Hess S; Stathopoulos A (2010) Linking response quality to survey engagement: a combined random scale and latent variable approach, European Transport Conference, Glasgow, October 2010. .
  • Orr S; Hess S; Sheldon R (2010) Consistency and Fungibility of Monetary Valuations in Transport, European Transport Conference, Glasgow, October 2010. .
  • Campbell D; Hess S (2010) Preference heterogeneity and attribute non-attendance: can they be separated?, European Transport Conference, Glasgow, October 2010. .
  • Campbell D; Hess S (2010) Outlying sensitivities in discrete choice data: consequences and remedies, fourth World Congress of Environmental and Resource Economists, Montreal. .
  • Hess S; Rose JM (2009) Should reference alternatives in pivot design SC surveys be treated differently?, TRB 88th Annual Meeting Compendium of Papers DVD .
  • Hess S; Daly A (2009) Calculating Errors for Measures Derived From Choice Modeling Estimates, TRB 88th Annual Meeting Compendium of Papers DVD .
  • Hess S; Ben-Akiva M; Gopinath D; Walker J (2009) Taste heterogeneity, correlation and elasticities in latent class choice models, Inaugural International Choice Modelling Conference, Harrogate. .
  • Campbell D; Hess S; Scarpa R; Rose JM (2009) Using finite mixture models to accommodate preference outliers in discrete choice modelling, Inaugural International Choice Modelling Conference, Harrogate. .
  • Chintakayala PK; Hess S; Rose JM; Wardman MR (2009) Effects of stated choice design dimensions on estimates, Inaugural International Choice Modelling Conference, Harrogate. .
  • Hess S; Rose JM (2009) Some lessons in stated choice survey design, European Transport Conference, Noordwijkerhout, October 200 .
  • Hess S; Adler T (2009) An analysis of trends in air travel behaviour using four related SP datasets collected between 2000 and 2005, European Transport Conference, Noordwijkerhout, October 2009. .
  • Chorlton K; Hess S; Jamson S; Wardman M (2009) An investigation into the demand for Intelligent Speed Adaptation (ISA) systems in the United Kingdom, European Transport Conference, Noordwijkerhout, October 2009. .
  • Rose JM; Hess S; Bliemer M; Daly A (2009) The impact of varying the number of repeated choice observations on the mixed multinomial logit model, European Transport Conference, Noordwijkerhout, October 2009. .
  • Chintakayala P; Hess S; Rose JM (2009) Using second preference choices in pivot surveys as a means of dealing with inertia, European Transport Conference, Noordwijkerhout, October 2009. .
  • Caussade S; Hess S (2009) An investigation into air travellers willingness to pay for ancillary service attributes within a branded fare context, European Transport Conference, Noordwijkerhout, October 2009. .
  • Campbell D; Hess S (2009) Outlying sensitivities in discrete choice data: causes, consequences and remedies, European Transport Conference, Noordwijkerhout, October 2009. .
  • Hess S; Ben-Akiva M; Gopinath D; Walker J (2009) Taste heterogeneity, correlation and elasticities in latent class choice models, 88th Annual Meeting of the Transportation Research Board .
  • Hess S; Hensher DA (2009) Using conditioning on observed choices to retrieve individual-specific attribute processing strategies, 88th Annual Meeting of the Transportation Research Board .
  • Hess S (2009) Evidence of passenger preferences for specific types of airports, 88th Annual Meeting of the Transportation Research Board .
  • Rose JM; Hess S (2009) Dual response choices in pivoted stated choice experiments, 88th Annual Meeting of the Transportation Research Board .
  • Bonsall P; Shires JA; Hess S (2009) The value of simplicity: an investigation of travellers’ response to simplified fare structures, 12th International Conference on Travel Behaviour Research, Jaipur. .
  • Polak JW; Hess S; Liu X (2008) Characterising Heterogeneity in Attitudes to Risk in Expected Utility Models of Mode and Departure Time Choice, 87th Annual Meeting of the Transportation Research Board .
  • Hess S; Smith CS; Stubits J (2008) Measuring Effects of Different Experimental Designs and Survey Administration Methods Using Atlanta Managed-Lanes Stated-Preference Survey, 87th Annual Meeting of the Transportation Research Board .
  • Hess S; Erath A; Axhausen KW (2008) Joint Valuation of Travel Time Savings Estimation on Four Separate Swiss Data, 87th Annual Meeting of the Transportation Research Board .
  • Mabit S; Hess S; Caussade S (2008) Correlation and Willingness-to-Pay Indicators in Transport Demand Modelling, 87th Annual Meeting of the Transportation Research Board .
  • Hess S; Ben-Akiva M; Gopinath D; Walker J (2008) Some developments in latent class modelling, European Transport Conference, Noordwijkerhout, October 2008. .
  • Hess S; Train KE (2008) Approximation issues in simulation-based estimation of random coefficients models, European Transport Conference, Noordwijkerhout, October 2008. .
  • Hess S; Rose JM; Polak JW (2008) Approaches for dealing with non-trading, lexicographic and inconsistent behaviour in stated choice data, European Transport Conference, Noordwijkerhout, October 2008. .
  • Chintakayala PK; Rose JM; Hess S; Wardman M (2008) UK experience with an advanced survey design for value of time studies, .
  • Collins A; Rose JMA; Hess S (2008) Search Based Internet Surveys: Airline Stated Choice by Rose, 8th International Conference on Survey Methods in Transport, Annecy, France. .
  • Hess S; Rose JM (2007) Intra-respondent taste heterogeneity in instantaneous panel data, European Transport Conference, Noordwijkerhout, October 2007. .
  • Bliemer MCJ; Rose JM; Hess S (2007) Approximation of Bayesian Efficiency in Experimental Choice Designs, 86th Annual Meeting of the Transportation Research Board .
  • Axhausen KW; Hess S; K nig A; Abay G; Bates JJ; Bierlaire M (2007) Income and distance elasticities of values of travel time savings: New Swiss results, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S; Rose JMA; Hensher DA (2007) Asymmetrical Preference Formation in Willingness to Pay Estimates in Discrete Choice Models, 11th triennial WCTR conference, Berkeley, CA. .
  • Bliemer MCJ; Rose JM; Hess S (2007) Approximation of Bayesian Efficiency in Experimental Choice Designs, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S; Bolduc D; Polak JW (2006) Random Covariance Heterogeneity in Discrete Choice Models, 85th Annual Meeting of the Transportation Research Board .
  • Hess S; Adler T; Polak JW (2006) Modelling Airport and Airline Choice Behaviour with Stated Preference Survey Data, 85th Annual Meeting of the Transportation Research Board .
  • Hess S (2006) Posterior analysis of random taste coefficients in air travel choice behaviour modelling, European Transport Conference, Strasbourg. .
  • Fosgerau M; Hess S (2006) Competing methods for representing random taste heterogeneity in discrete choice models, European Transport Conference, Strasbourg. .
  • Hess S; Bierlaire M; Polak JW (2006) A systematic comparison of continuous and discrete mixture models, 11th International Conference on Travel Behaviour Research, Kyoto. .
  • Hess S; Bolduc D; Polak JW (2006) Random covariance heterogeneity in discrete choice models, 11th International Conference on Travel Behaviour Research, Kyoto. .
  • Daly A; Hess S; Polak JW; Hyman G; Rohr C (2005) Modelling departure time and mode choice, European Regional Science Conference, Amsterdam. .
  • Hess S; Bierlaire M; Polak JW (2005) Estimation of value of travel-time savings using Mixed Logit models, 84th Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW (2005) Accounting for random taste heterogeneity in airport-choice modelling, 84th Annual Meeting of the Transportation Research Board .
  • Bastin F; Cirillo C; Hess S (2005) Evaluation of advanced optimisation methods for estimating Mixed Logit models, 84th Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW; Daly AJ (2005) Flexible Substitution Patterns in Models of Mode and Time of Day Choice: New evidence from the UK and the Netherlands, 84th Annual Meeting of the Transportation Research Board .
  • Hess S (2004) An analysis of the effects of speed limit enforcement cameras with differentiation by road type and catchment area, 83rd Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW; Daly AJ (2003) On the performance of shuffled Halton sequences in the estimation of discrete choice models, European Transport Conference, Strasbourg. .

Conference Presentations

  • Hess S; Börjesson M (2017) Understanding attitudes towards congestion pricing: a latent variable investigation with data from four cities, Transportation Letters pp.1-15. doi: 10.1080/19427867.2016.1271762
  • Ojeda-Cabral M; Batley R; Hess S (2016) The value of travel time: random utility versus random valuation, Transportmetrica A: Transport Science 12, pp.230-248. doi: 10.1080/23249935.2015.1125398
  • Beck MJ; Hess S (2016) Willingness to accept longer commutes for better salaries: Understanding the differences within and between couples, Transportation Research Part A: Policy and Practice 91, pp.1-16. doi: 10.1016/j.tra.2016.05.019
  • Ojeda Cabral MA; Zheng J; Hess S; Dekker T (2016) Making choices: status quo versus trade-offs, hEART Symposium .
  • Ojeda-Cabral M; Batley RP; Hess S (2015) Understanding individuals' valuations of travel time: the role of stated choice design variables, 14th International Conference on Travel Behaviour Research, Windsor. .
  • Outwater M; Bradley M; Ferdous N; Bhat C; Pendyala R; Hess S; Daly A; LaMondia J (2015) Tour-Based National Model System to Forecast Long-Distance Passenger Travel in the United States, 94th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Dekker T; Hess S; Cranenburgh V (2015) Indirect Inference for the Application of Random Regret Minimization to Large-Scale Travel Demand, 94th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Chorus CG (2015) Utility Maximisation and Regret Minimisation: A Mixture of a Generalisation, BOUNDED RATIONAL CHOICE BEHAVIOUR: APPLICATIONS IN TRANSPORT pp.31-47.
  • Ehreke I; Hess S; Weis C; Axhausen KW (2015) Reliability in the German value of time study, Transportation Research Record 2525, pp.14-22. doi: 10.3141/2495-02
  • Hess S; Daly AJ; Bradley M; Outwater M; Dekker T (2015) Testing the Use of Indirect Influence for Large Scale Modelling, Fourth International Choice Modelling Conference, Austin, Texas. .
  • Fox JB; Hess S; Daly AJ (2015) The Temporal Transferability of Mixed Logit Mode-Destination Choice Models, Fourth International Choice Modelling Conference, Austin, Texas. .
  • Daly AJ; Hess S; Lu H; Rohr C (2015) Modelling the Impact of Multi-Buy Promotions on Alcohol Purchasing Behaviour: A Comparison of Estimation and Implementation of Sample Selection Models and the Multiple Discrete-Continuous Extreme Value (MCDEV) Model, Fourth International Choice Modelling Conference, Austin, Texas. .
  • Bradley M; Hess S; Adler TJ; Fowler M (2015) The Influence of Anchoring on Value of Time Estimation in Stated Preference Experiments, Fourth International Choice Modelling Conference, Austin, Texas. .
  • Fox JB; Hess S; Daly AJ (2015) Temporal Transferability of Models of Mode and Destination Choice, 14th International Conference on Travel Behaviour Research, Windsor. .
  • Spitz GM; Hess S (2015) How much do attitudes and values matter in mode choice?, 14th International Conference on Travel Behaviour Research, Windsor. .
  • Ehreke I; Hess S; Axhausen KW (2015) The German value of time and value of reliability study: Comparing alternative model formulations, 14th International Conference on Travel Behaviour Research, Windsor. .
  • Calastri C; Choudhury C; Hess S (2015) Modelling mode choice with messy GPS data: a case from Italy, 14th International Conference on Travel Behaviour Research, Windsor. .
  • Hess S; Bliemer M; Hibberd D; Choudhury C (2015) Understanding lane changing behaviour leading up to roadworks on motorways: a latent plan application using combined simulator experiments and stated preference surveys, 14th International Conference on Travel Behaviour Research, Windsor. .
  • Hess S; Daly AJ; Dekker T; Cabral MO; Batley RP (2015) Specification and estimation of behavioural models for the 2015 UK value of time study, hEART 2015 – 4th Symposium of the European Association for Research in Transportation, Copenhagen. .
  • Hess S (2014) Impact of unimportant attributes in stated choice surveys, EUROPEAN JOURNAL OF TRANSPORT AND INFRASTRUCTURE RESEARCH 14, pp.349-361.
  • Ojeda Cabral MA; Batley RP; Hess S (2014) A comparison of the national value of time studies in the UK and Denmark, ITEA Khumo Nectar .
  • Giergiczny M; Hess S; Dekker D; Chintakayala PK (2014) Testing Consistency Between Choices in Best-Worst Surveys, 93rd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Stathopoulos A (2014) Linking Decision Process to Indicators of Real-World Perceptions in a Latent Variable Latent Class Approach, 93rd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Dekker T; Hess S; Arentze TA; Chorus C (2014) Incorporating Needs Satisfaction and Regret Minimization in Discrete Choice Model of Leisure Activities, 93rd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Outwater ML; Bhat CR; Pendyala RM; Hess S; Sana B; Ferdous N; Woodford W; Sidharthan R (2014) TCRP Project H-37: Characteristics of Premium Transit Services That Affect Mode Choice-Key Findings and Results, 93rd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Bliemer M; Hibberd D (2014) Combining evidence on driver behaviour from simulator experiments and stated preference surveys, 10th International Conference on Transport Survey Methods, Leura, Australia .
  • Beck M; and Hess S (2014) It�s a lovely day for a walk: pedestrian route choice with realism, 10th International Conference on Transport Survey Methods, Leura, Australia .
  • Cabral M; Hess S; Batley R (2014) The Value of Travel Time Changes: A Comparison of British and Danish National Studies,, hEART 2014 – 3rd Symposium of the European Association for Research in Transportation, Copenhagen. .
  • Hess S; Daly AJ; Bradley M (2014) Using indirect inference to enable the use of cross-nested logit model for large scale modelling, hEART 2014 – 3rd Symposium of the European Association for Research in Transportation, Copenhagen. .
  • Hess S; Stathopoulos A; Campbell D; O Neill V; Caussade S (2013) It’s not that I don’t care, I just don’t care very much: confounding between attribute non-attendance and taste heterogeneity, 92nd Annual Meeting of the Transportation Research Board .
  • Rose JM; Hess S; Greene WH; Hensher DA (2013) Generalized Multinomial Logit Model: Misinterpreting Scale and Preference Heterogeneity in Discrete Choice Models or Untangling the Un-Untanglable?, 92nd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Daly AJ; Dumont J; Sanko N (2013) When Explanatory Variables Are Unobserved: Example of Latent Income, 92nd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Batley RP; Hess S (2013) Simple Test for Identifying Violations of Random Utility Model, 92nd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Stathopoulos A; Campbell D; O Neill V; Caussade S (2013) It�s not that I don�t care, I just don�t care very much: confounding between attribute non-attendance and taste heterogeneity, 92nd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Ojeda Cabral M; Batley RP; Hess S (2013) The Value of Travel Time Changes and Three Key Sources of Variation, International Conference on Uncertainties in Transport Infrastructure Evaluation, Copenhagen .
  • Hess S; Beck M; Chorus C (2013) Finding your way out: utility maximisation and regret minimisation in the presence of opt out alternatives, Third International Choice Modelling Conference, Sydney. .
  • Giergiczny M; Chintakayala P; Dekker T; Hess S (2013) Consistency (or lack thereof) between choices in best-worst surveys, Third International Choice Modelling Conference, Sydney. .
  • Mariel P; Meyerhof J; Hess S (2013) Using a latent variable choice model to capture heterogeneous attitudes and preferences toward the landscape externalities of wind power generation, Third International Choice Modelling Conference, Sydney. .
  • Hoyos D; Mariel P; Hess S (2013) Environmental Value Orientations in Discrete Choice Experiments: A Latent Variables Approach, Third International Choice Modelling Conference, Sydney. .
  • Hess S; Sanko N; Daly AJ; Dumont J (2013) A latent variable approach to dealing with missing or inaccurately measured variables: the case of income, Third International Choice Modelling Conference, Sydney. .
  • Vuk V; Bowman JL; Hess S; Daly AJ (2013) Impact of household time constraints on person travel demand: the notion of family priority time in activity based models, Third International Choice Modelling Conference, Sydney. .
  • Hess S; Giergiczny M; Dumont J (2013) Individual-level models vs. random coefficients sample level models: contrasts and mutual benefits, Third International Choice Modelling Conference, Sydney. .
  • Klojgaard M; Hess S (2013) Understanding the role of practitioners� and patients� perceptions in treatment choices in the face of limited clinical evidence: A Hybrid Choice Model approach in Health Economics, Third International Choice Modelling Conference, Sydney. .
  • Dumont J; Hess S; Daly AJ; Ferdous N (2013) The use of the Multiple Discrete Continuous Extreme Value modeling framework when the budget is latent: two consumer package good examples, Third International Choice Modelling Conference, Sydney. .
  • Dekker T; Hess S; Brouwer R; Hofkes M (2013) Implicitly or explicitly uncertain? An integrated choice and latent variable model to address decision certainty in stated choice experiments, Third International Choice Modelling Conference, Sydney. .
  • Daly A; Hess S; Dekker T (2013) Transtools III: development of a new transport model for Europe � preliminary work on non-linearities and value of time inputs, 13th triennial WCTR conference, Rio de Janeiro. .
  • Daly A; Hess S; Dekker T (2013) Sampling of alternatives for spatial choice modelling, 13th triennial WCTR conference, Rio de Janeiro. .
  • Hess S; Stathopoulos A (2013) Linking the decision process to indicators of real world perceptions in a latent variable latent class approach, hEART 2013 – 2nd Symposium of the European Association for Research in Transportation, Stockholm. .
  • Vuk G; Bowman J; Daly AJ; Hess S (2013) Impact of the household on person travel demand: the notion of family priority time in activity based models, hEART 2013 – 2nd Symposium of the European Association for Research in Transportation, Stockholm. .
  • Hess S; Quddus M; Rieser-Sch ssler N; Daly AJ (2013) Developing advanced route choice models for heavy goods vehicles using GPS data, hEART 2013 – 2nd Symposium of the European Association for Research in Transportation, Stockholm. .
  • Arrelana J; Daly AJ; Hess S; Ortuzar JDD; Rizzi L (2012) Developing surveys for the study of departure time choice: a two-stage efficient design approach, 91st Annual Meeting of the Transportation Research Board .
  • Hess S; Rose JM (2012) Can Scale and Coefficient Heterogeneity Be Separated in Random Coefficients Models? Presented at the 91st Annual Meeting of the Transportation Research Board., 91st Annual Meeting of the Transportation Research Board .
  • Hess S; Stathopoulos A (2012) Linking response quality to survey engagement: a combined random scale and latent variable approach presented at the 91st Annual Meeting of the Transportation Research Board, 91st Annual Meeting of the Transportation Research Board .
  • Hess S; Hensher DA; Daly AJ (2012) Not bored yet : revisiting respondent fatigue in stated choice experiments, 91st Annual Meeting of the Transportation Research Board .
  • O Neill V; Hess S; Campbell D (2012) I’ll Take the Money and You Can Have the Short Commute: Study of Household-Level Work and Travel Decisions, 91st Annual Meeting of the Transportation Research Board .
  • Hess S; Hensher DA (2012) Making Use of Respondent Reported Processing Information to Understand Attribute Importance: Latent Variable Scaling Approach, 91st Annual Meeting of the Transportation Research Board .
  • Hess S; Stathopoulos A (2011) Linking response quality to survey engagement: a combined random scale and latent variable approach presented at the 2nd International Choice Modelling Conference., Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • Hess S; Daly AJ; Dumont J; Sanko N (2012) When explanatory variables are unobserved: the example of latent income, 13th International Conference on Travel Behaviour Research, Toronto. .
  • Hess S; Collins AC; Rose JM (2012) Joint modelling of decision process and choice using data from an interactive stated choice survey on air travel behaviour, 13th International Conference on Travel Behaviour Research, Toronto. .
  • Hess S; Stathopoulos A (2012) Linking the decision process to underlying attitudes and perceptions: a latent variable latent class construct. Presented at the 13th International Conference on Travel Behaviour Research., 13th International Conference on Travel Behaviour Research, Toronto. .
  • Arellana J; Daly AJ; Hess S; Ortúzar RJSD; Rizzi L (2012) The flexibility of departure time for work based trips: an integrated choice and latent variable approach, 13th International Conference on Travel Behaviour Research, Toronto. .
  • Dekker T; Hess S (2012) The limits of flexibility in controlling for heterogeneity in mixed multinomial logit models - an argument for using latent class models, 13th International Conference on Travel Behaviour Research, Toronto. .
  • Rose JM; Hess S; Hensher DA; Greene WH (2012) The Generalised Multinomial Logit model: Misinterpreting scale and preference heterogeneity in discrete choice models or untangling the un-untanglable?, 13th International Conference on Travel Behaviour Research, Toronto. .
  • Batley RP; Hess S (2012) A simple test for identifying violations of the Random Utility Model (RUM), 13th International Conference on Travel Behaviour Research, Toronto. .
  • Hess S; Rose JM (2012) Can Scale and Coefficient Heterogeneity Be Separated in Random Coefficients Models? Presented at the Conjoint Analysis in Health Care conference, 2012 Conjoint Analysis in Health Care conference, Orlando, Florida. .
  • Hess S; Stathopoulos A (2012) Linking the decision process to underlying attitudes and perceptions: a latent variable latent class construct, 13th International Conference on Travel Behaviour Research, Toronto. .
  • Rose JM; Hess S; Bliemer MCJ; Daly A (2011) Impact of Varying Number of Repeated Choice Observations on Mixed Multinomial Logit Model, 90th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Stathopoulos A (2011) Linking response quality to survey engagement: a combined random scale and latent variable approach, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • Abou Zeid M; Ben-Akiva ME; Bierlaire M; Choudhury CF; Hess S (2011) Attitudes and Value of Time Heterogeneity, 90th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Daly AJ; Hess S; Train KE (2011) Ensuring Finite Moments for Willingness to Pay in Random Coefficient Models, 90th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Rose JM; Hess S; Collins A (2011) Impact of Violations of Model Assumptions: Role of Lexicography, Inconsistent Choices, and Changing Preferences in Model Estimation, 90th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Stathopoulos A; Daly AJ (2011) Mixing of Behavioural Processes: Modelling Framework and Four Case Studies, 90th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Daly AJ; Hess S (2011) Simple Approaches for Random Utility Modelling with Panel Data, 90th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Dumont J; Adler TJ; Hess S; Neafsey WC (2011) Using individual-level parameter estimates to investigate evidence of lexicographic behavior and heterogeneity in information processing strategies, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • O Neill VL; Hess S; Campbell D; Hutchinson G (2011) Incorporating latent attitudes in analysing food choices, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • Connors R; Hess S; Daly A (2011) On the computation of probit choice probabilities, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • Hess S; Daly AJ; Hensher DA; Adler TJ (2011) The role of constants in WTP computation, European Transport Conference, Glasgow, October 2011. .
  • Stathopoulos A; Hess S (2011) Revisiting reference point formation, gains-losses asymmetry and non-linear sensitivity: one size does not fit all!, European Transport Conference, Glasgow, October 2011. .
  • Dumont J; Adler TJ; Hess S; Neafsey WC (2011) Using individual-level parameter estimates to investigate evidence of lexicographic behaviour and heterogeneity in information processing strategies, European Transport Conference, Glasgow, October 2011. .
  • Abou Zeid M; Ben-Akiva ME; Bierlaire M; Choudhury CF; Hess S (2011) Attitudes and Value of Time Heterogeneity, 90th Annual Meeting of the Transportation Research Board .
  • Daly AJ; Hess S; Train KE (2011) Ensuring Finite Moments for Willingness to Pay in Random Coefficient Models, 90th Annual Meeting of the Transportation Research Board .
  • Rose JM; Hess S; Bliemer MCJ; Daly A (2011) Impact of Varying Number of Repeated Choice Observations on Mixed Multinomial Logit Model, 90th Annual Meeting of the Transportation Research Board .
  • Orr S; Hess S; Sheldon R (2011) Consistency and Fungibility of Monetary Valuations in Transport, 90th Annual Meeting of the Transportation Research Board .
  • Hess S; Stathopoulos A; Daly AJ (2011) Mixing of Behavioural Processes: Modelling Framework and Four Case Studies, 90th Annual Meeting of the Transportation Research Board .
  • Daly AJ; Hess S (2011) Simple Approaches for Random Utility Modelling with Panel Data, 90th Annual Meeting of the Transportation Research Board .
  • Hess S; Stathopoulos A; Daly AJ (2011) Allowing for heterogeneous decision rules in discrete choice models: am approach and four case studies, European Transport Conference, Glasgow, October 2011. .
  • Dumont J; Adler TJ; Hess S; Neafsey WC (2011) Using individual-level parameter estimates to investigate evidence of lexicographic behavior and heterogeneity in information processing strategies. Presented at ICMC, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • Orr S; Hess S; Sheldon R (2011) Consistency and Fungibility of Monetary Valuations in Transport: an empirical analysis of framing and mental accounting effects, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • O Neill VL; Hess S; Campbell D; Hutchinson G (2011) Incorporating latent attitudes in analysing food choices, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • Connors R; Hess S; Daly A (2011) On the computation of probit choice probabilities, Second International Choice Modelling Conference, Oulton Hall, Leeds. .
  • Johnson D; Matthews B; Hess S; Bielefeldt C (2011) An indirect flight from my local airport or a direct flight from an alternative airport: how does surface access influence the decision?, European Transport Conference, Glasgow, October 2011. .
  • Hess S; Daly AJ; Hensher DA; Adler TJ (2011) The role of constants in WTP computation, European Transport Conference, Glasgow, October 2011. .
  • Stathopoulos A; Hess S (2011) Revisiting reference point formation, gains-losses asymmetry and non-linear sensitivity: one size does not fit all!, European Transport Conference, Glasgow, October 2011. .
  • Hess S; Hensher DA (2011) Making use of respondent reported processing information to understand attribute importance: a latent variable scaling approach, European Transport Conference, Glasgow, October 2011. .
  • Dumont J; Adler TJ; Hess S; Neafsey WC (2011) Using individual-level parameter estimates to investigate evidence of lexicographic behaviour and heterogeneity in information processing strategies. Presented at ETC, European Transport Conference, Glasgow. .
  • Hess S; Stathopoulos A; Campbell D; O Neill V; Caussade S (2011) It�s not that I don�t care, I just don�t care very much: confounding between attribute non-attendance and taste heterogeneity, European Transport Conference, Glasgow, October 2011. .
  • Hess S; Train KE (2010) Approximation Issues in Simulation-Based Estimation of Random Coefficient Models, 89th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Shires JD; Bonsall PW (2010) Treatment of Respondent Uncertainty in Stated-Choice Survey for Fare Simplification on Bus Journeys, Transportation Research Board 89th Meeting .
  • Orr S; Hess S; Sheldon R (2010) Consistency and Fungibility of Monetary Valuations in Transport, European Transport Conference, Glasgow, October 2010. .
  • Hess S; Hensher DA; Daly A (2010) Not bored yet � revisiting respondent fatigue in stated choice experiments, European Transport Conference, Glasgow, October 2010. .
  • Hess S; Adler T (2010) Experimental Designs for the Real World, 89th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Stathopoulos A (2010) Linking response quality to survey engagement: a combined random scale and latent variable approach, European Transport Conference, Glasgow, October 2010. .
  • Daly AJ; Hess S (2010) Simple Approaches for Random Utility Modelling with Panel Data, European Transport Conference, Glasgow, October 2010. .
  • Stathopoulos A; Hess S (2010) Modelling multi-attribute reference dependence in a commuting choice experiment: does one size fit all?, 12th triennial WCTR conference, Lisbon. .
  • Hess S (2010) Customising surveys to accommodate heterogeneous information processing strategies, European Transport Conference, Glasgow, October 2010. .
  • Gibson V; Hess S; Campbell D; Beharry-Borg N (2010) Individual versus intra-household decision making: who really wears the trousers?, European Transport Conference, Glasgow, October 2010. .
  • Caussade S; Hess S (2010) Customers� Willingness To Pay For Intermediate Cabins In The Airline Industry: A Trade-Off Between Improved Service And Frequent Flier Benefits, European Transport Conference, Glasgow, October 2010. .
  • Hess S; Fowler M; Adler A (2010) A joint model for vehicle type and fuel type, 12th triennial WCTR conference, Lisbon. .
  • Daly A; Hess S; Patruni B; Potoglou D; Rohr C (2010) Modelling the role of attitudes in eliciting individuals’ preference across liberty, privacy and security, 12th triennial WCTR conference, Lisbon. .
  • Rose JM; Hess S; Collins A; Bain S (2010) An analysis of the impact of non-compensatory behaviour of logit model estimation, 12th triennial WCTR conference, Lisbon. .
  • Daly A; Hess S (2010) Simple methods for panel data analysis, 12th triennial WCTR conference, Lisbon. .
  • Hess S; Beharry-Borg N (2010) Accounting for latent attitudes in an analysis of the willingness to pay for improved water quality by beach visitors in Tobago, fourth World Congress of Environmental and Resource Economists, Montreal. .
  • Hess S; Train KE (2010) Approximation Issues in Simulation-Based Estimation of Random Coefficient Models, 89th Annual Meeting of the Transportation Research Board .
  • Hess S; Rose JM; Bain S (2010) Random Scale Heterogeneity in Discrete Choice Models, 89th Annual Meeting of the Transportation Research Board .
  • Hess S; Adler T (2010) Experimental Designs for the Real World, 89th Annual Meeting of the Transportation Research Board .
  • Daly A; Hess S; Patruni B; Potoglou D; Rohr C (2010) Modelling the role of attitudes in eliciting individuals’ preference across liberty, privacy and security, 12th triennial WCTR conference, Lisbon. .
  • Hess S; Fowler M; Adler A (2010) A joint model for vehicle type and fuel type. Presented at WCTR, 12th triennial WCTR conference, Lisbon. .
  • Daly A; Hess S (2010) Simple methods for panel data analysis, 12th triennial WCTR conference, Lisbon. .
  • Hess S; Beharry-Borg N (2010) Accounting for latent attitudes in an analysis of the willingness to pay for improved water quality by beach visitors in Tobago, fourth World Congress of Environmental and Resource Economists, Montreal. .
  • Hess S (2010) Customising surveys to accommodate heterogeneous information processing strategies, European Transport Conference, Glasgow, October 2010. .
  • Hess S; Hensher DA; Daly A (2010) Not bored yet: revisiting respondent fatigue in stated choice experiments, European Transport Conference, Glasgow, October 2010. .
  • Gibson V; Hess S; Campbell D; Beharry-Borg N (2010) Individual versus intra-household decision making: who really wears the trousers?, European Transport Conference, Glasgow, October 2010. .
  • Daly AJ; Hess S (2010) Simple Approaches for Random Utility Modelling with Panel Data, European Transport Conference, Glasgow, October 2010. .
  • Caussade S; Hess S (2010) Customers’ Willingness To Pay For Intermediate Cabins In The Airline Industry: A Trade-Off Between Improved Service And Frequent Flier Benefits, European Transport Conference, Glasgow, October 2010. .
  • Hess S; Rose J; Polak J (2009) Nontrading, lexicographic and inconsistent behaviour in stated-preference choice, 87th Anuual Metting of the Transportation Research Board .
  • Chintakayala PK; Hess S; Rose JM; Wardman MR (2009) Effects of stated choice design dimensions on estimates, Inaugural International Choice Modelling Conference, Harrogate. .
  • Chorlton K; Hess S; Jamson S; Wardman M (2009) An investigation into the demand for Intelligent Speed Adaptation (ISA) systems in the United Kingdom, European Transport Conference, Noordwijkerhout, October 2009. .
  • Hess S; Ben-Akiva M; Gopinath D; Walker J (2009) Taste heterogeneity, correlation and elasticities in latent class choice models, 88th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Ben-Akiva M; Gopinath D; Walker J (2009) Taste heterogeneity, correlation and elasticities in latent class choice models, Inaugural International Choice Modelling Conference, Harrogate. .
  • Campbell D; Hess S; Scarpa R; Rose JM (2009) Using finite mixture models to accommodate preference outliers in discrete choice modelling, Inaugural International Choice Modelling Conference, Harrogate. .
  • Collins AT; Rose JM; Hess S (2009) Search based internet surveys: airline stated choice, 88th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Bonsall P; Shires JA; Hess S (2009) The value of simplicity: an investigation of travellers’ response to simplified fare structures, 12th International Conference on Travel Behaviour Research, Jaipur. .
  • Hess S; Rose JM; Bain S (2009) Random scale heterogeneity in discrete choice models, European Transport Conference, Noordwijkerhout, October 2009. .
  • Hess S; Ben-Akiva M; Gopinath DA; Walker J (2009) Advantages of latent class choice models over continuous mixed logit models, 12th International Conference on Travel Behaviour Research, Jaipur. .
  • Collins AT; Rose JM; Hess S (2009) Search based internet surveys: airline stated choice, 88th Annual Meeting of the Transportation Research Board .
  • Hess S; Ben-Akiva M; Gopinath DA; Walker J (2009) Advantages of latent class choice models over continuous mixed logit models, 12th International Conference on Travel Behaviour Research, Jaipur. .
  • Hess S; Rose JM; Bain S (2009) Random scale heterogeneity in discrete choice models, European Transport Conference, Noordwijkerhout, October 2009. .
  • Hess S; Fowler M; Adler T; Bahreinian A (2009) A joint model for vehicle type and fuel type. Presented at ETC, European Transport Conference, Noordwijkerhout, October 2009. .
  • Daly A; Hess S; Train K (2009) Assuring Finite Moments For Willingness To Pay In Random Coefficient Models, European Transport Conference, Noordwijkerhout, October .
  • Chintakayala PK; Rose JM; Hess S; Wardman M (2008) UK experience with an advanced survey design for value of time studies, European Transport Conference, Noordwijkerhout, October 2008. .
  • Hess S; Erath A; Axhausen KW (2008) Joint Valuation of Travel Time Savings Estimation on Four Separate Swiss Data, 87th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Polak JW; Hess S; Liu X (2008) Characterising Heterogeneity in Attitudes to Risk in Expected Utility Models of Mode and Departure Time Choice, 87th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Mabit S; Hess S; Caussade S (2008) Correlation and Willingness-to-Pay Indicators in Transport Demand Modelling, 87th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Ben-Akiva M; Gopinath D; Walker J (2008) Some developments in latent class modelling, European Transport Conference, Noordwijkerhout, October 2008. .
  • Hess S; Rose JM (2008) Intra-respondent Taste Heterogeneity in Instantaneous Panel Surveys, 87th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Daly A (2008) Calculating errors for measures derived from choice modelling estimates, European Transport Conference, Noordwijkerhout, October 2008. .
  • Hess S; Rose JM; Polak JW (2008) Approaches for dealing with non-trading, lexicographic and inconsistent behaviour in stated choice data, European Transport Conference, Noordwijkerhout, October 2008. .
  • Hess S; Train KE (2008) Approximation issues in simulation-based estimation of random coefficients models, European Transport Conference, Noordwijkerhout, October 2008. .
  • Collins A; Rose JMA; Hess S (2008) Search Based Internet Surveys: Airline Stated Choice by Rose, 8th International Conference on Survey Methods in Transport, Annecy, France. .
  • Hess S; Rose JM (2008) Intra-respondent Taste Heterogeneity in Instantaneous Panel Surveys, 87th Annual Meeting of the Transportation Research Board .
  • Hess S; Rose JM (2007) Intra-respondent taste heterogeneity in instantaneous panel data, European Transport Conference, Noordwijkerhout, October 2007. .
  • Bliemer MCJ; Rose JM; Hess S (2007) Approximation of Bayesian Efficiency in Experimental Choice Designs, 11th triennial WCTR conference, Berkeley, CA. .
  • Rose JM; Hess S; Hensher DA (2007) Examination of the respondent reported attribute processing strategies in stated choice experiments constructed from revealed preference data, 86th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Axhausen KW; Hess S; K nig A; Abay G; Bates JJ; Bierlaire M (2007) State of the art estimates of the Swiss value of travel time savings, 86th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Rose JMA; Hensher DA (2007) Asymmetrical Preference Formation in Willingness to Pay Estimates in Discrete Choice Models, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S (2007) Reference Dependence in SP Air Travel Data, 11th Air Transport Research Society World Conference, Berkeley, CA, June 2007. .
  • Polak JW; Hess S (2007) Expected utility and non-expected utility models of risky choice: a new framework and estimation results, European Transport Conference, Noordwijkerhout, October 2007. .
  • Hess S; Erath A; Axhausen KW (2007) Reducing bias in value of time estimates by joint estimation on multiple datasets: a case study in Switzerland, European Transport Conference, Noordwijkerhout, October 2007. .
  • Collins A; Hess S; Rose JM (2007) Stated Preference survey design in air travel choice behaviour modelling, European Transport Conference, Noordwijkerhout, October 2007. .
  • Hess S; Rose JM (2007) Obtaining further insights into taste heterogeneity by conditioning on observed choices, European Transport Conference, Noordwijkerhout, October 2007. .
  • Hess SA; Rose JM (2007) Some lessons for working with repeated choice data, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S; Polak JW (2007) Modelling air travel choice behaviour in Greater London, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S (2007) Stated preference models for airport and airline choice with conditioning on observed choices, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S; Rose JM (2007) A latent class approach to modelling heterogeneous information processing strategies in SP studies, Oslo Workshop on Valuation Methods in Transport Planning, Oslo. .
  • Hess S (2007) Modelling the valuation of travel time savings, Annual UTSG meeting, Harrogate. .
  • Hess S (2007) Posterior analysis of random taste coefficients in air travel choice behaviour modelling, 86th Annual Meeting of the Transportation Research Board .
  • Hess S; Rose JM; and Hensher DA (2007) Asymmetrical Preference Formation in Willingness to Pay Estimates in Discrete Choice Models, 86th Annual Meeting of the Transportation Research Board .
  • Rose JM; Hess S; Hensher DA (2007) Examination of the respondent reported attribute processing strategies in stated choice experiments constructed from revealed preference data, 86th Annual Meeting of the Transportation Research Board .
  • Axhausen KW; Hess S; K nig A; Abay G; Bates JJ; Bierlaire M (2007) State of the art estimates of the Swiss value of travel time savings, 86th Annual Meeting of the Transportation Research Board .
  • Hess S (2007) Reference Dependence in SP Air Travel Data, 11th Air Transport Research Society World Conference, Berkeley, CA, June 2007. .
  • Hess SA; Rose JM (2007) Some lessons for working with repeated choice data, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S; Polak JW (2007) Modelling air travel choice behaviour in Greater London, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S (2007) Stated preference models for airport and airline choice with conditioning on observed choices, 11th triennial WCTR conference, Berkeley, CA. .
  • Hess S; Rose JM (2007) A latent class approach to modelling heterogeneous information processing strategies in SP studies, Oslo Workshop on Valuation Methods in Transport Planning, Oslo. .
  • Hess S (2007) Modelling the valuation of travel time savings, Annual UTSG meeting, Harrogate. .
  • Polak JW; Hess S (2007) Expected utility and non-expected utility models of risky choice: a new framework and estimation results, European Transport Conference, Noordwijkerhout, October 2007. .
  • Hess S; Erath A; Axhausen KW (2007) Reducing bias in value of time estimates by joint estimation on multiple datasets: a case study in Switzerland, European Transport Conference, Noordwijkerhout, October 2007. .
  • Collins A; Hess S; Rose JM (2007) Stated Preference survey design in air travel choice behaviour modelling, European Transport Conference, Noordwijkerhout, October 2007. .
  • Hess S; Rose JM (2007) Obtaining further insights into taste heterogeneity by conditioning on observed choices, European Transport Conference, Noordwijkerhout, October 2007. .
  • Hess S (2006) Posterior analysis of random taste coefficients in air travel choice behaviour modelling, European Transport Conference, Strasbourg. .
  • Hess S; Rose JMA; Hensher DA (2006) Asymmetrical Preference Formation in Willingness to Pay Estimates in Discrete Choice Models, European Transport Conference, Strasbourg. .
  • Hess S; Bolduc D; Polak JW (2006) Random Covariance Heterogeneity in Discrete Choice Models, 85th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Axhausen KW; Polak JW (2006) Distributional Assumptions in Mixed Logit Models, 85th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Polak JW (2006) Cross-Nested Logit Modelling of Combined Choice of Airport, Airline, and Access Mode, 85th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Bolduc D; Polak JW (2006) Random covariance heterogeneity in discrete choice models, 11th International Conference on Travel Behaviour Research, Kyoto. .
  • Hess S; Axhausen KW; Polak JW (2006) Distributional assumptions in Mixed Logit models, 6th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Mabit S; Caussade S; Hess S (2006) Representation of taste heterogeneity in willingness-to-pay indicators: past mistakes, state-of-the-art, and future directions, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW; Bierlaire M (2006) Confounding between substitution patterns and random taste heterogeneity, European Transport Conference, Strasbourg. .
  • Hess S; Polak JWA; Bierlaire M (2006) Confounding between substitution patterns and random taste heterogeneity, 6th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Bierlaire M; Polak JW (2006) Discrete Mixture models, 6th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Axhausen KW; Polak JW (2006) Distributional Assumptions in Mixed Logit Models, 85th Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW (2006) Cross-Nested Logit Modelling of Combined Choice of Airport, Airline, and Access Mode, 85th Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JWA; Bierlaire M (2006) Confounding between substitution patterns and random taste heterogeneity, 6th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Bierlaire M; Polak JW (2006) Discrete Mixture models, 6th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Axhausen KW; Polak JW (2006) Distributional assumptions in Mixed Logit models, 6th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Rose JMA; Hensher DA (2006) Asymmetrical Preference Formation in Willingness to Pay Estimates in Discrete Choice Models, European Transport Conference, Strasbourg. .
  • Mabit S; Caussade S; Hess S (2006) Representation of taste heterogeneity in willingness-to-pay indicators: past mistakes, state-of-the-art, and future directions, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW; Bierlaire M (2006) Confounding between substitution patterns and random taste heterogeneity, European Transport Conference, Strasbourg. .
  • Daly A; Hess S; Polak JW; Hyman G; Rohr C (2005) Modelling departure time and mode choice, European Regional Science Conference, Amsterdam. .
  • Hess S; Polak JW; Daly AJ (2005) Flexible Substitution Patterns in Models of Mode and Time of Day Choice: New evidence from the UK and the Netherlands, 84th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Bolduc D; Polak JW (2005) Random Covariance Heterogeneity in Discrete Choice Models, European Regional Science Conference, Amsterdam. .
  • Hess S; Bierlaire M; Polak JW (2005) Capturing taste heterogeneity and correlation structure with Mixed GEV models, 84th Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Bolduc D; Polak JW (2005) Random Covariance Heterogeneity in Discrete Choice Models, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW (2005) Cross-Nested Logit modelling of the combined choice of airport, airline and access-mode, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW; Bierlaire (2005) Functional approximations to alternative-specific constants in time-period choice-modelling, Transportation and Traffic Theory: Flow, Dynamics and Human Interaction, 16th International Symposium on Transportation and Traffic Theory, College Park, MA. .
  • Hess S; Adler T; Polak JW (2005) Computing Willingness to pay indicators for air travellers from SP survey data, 9th Air Transport Research Society Word Conference, Rio de Janeiro. .
  • Battersby B; Hess S (2005) Accounting for seat capacity and availability constraints in modelling air-travel choice behaviour, 9th Air Transport Research Society Word Conference, Rio de Janeiro. .
  • Hess S (2005) Analysing air travel choice behaviour in the Greater London area, European Regional Science Conference, Amsterdam. .
  • Hess S; Bierlaire M; Polak JW (2005) Discrete mixtures of random utility models, European Transport Conference, Strasbourg. .
  • Rohr C; Daly A; Hess S; Bates J; Polak JW; Hyman G (2005) Modelling Time Period Choice: Experience from the UK and the Netherlands, European Transport Conference, Strasbourg. .
  • Hess S (2005) Competition between London Airports, Meeting of the German Aviation Research Society, Vienna. .
  • Hess S; Bierlaire M; Polak JW (2005) Discrete mixtures of GEV models, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Bierlaire M; Polak JW (2005) Mixed GEV modelling of mode-choice, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Bierlaire M; Polak JW (2005) Interpretation of counter-intuitively signed value of travel-time saving estimates, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess A; Axhausen KW (2005) Distributional assumptions in the representation of random taste heterogeneity, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S (2005) Modelling airport choice in the London area, Annual UTSG meeting, Bristol. .
  • Hess S; Bierlaire M; Polak JW (2005) Capturing taste heterogeneity and correlation structure with Mixed GEV models, 84th Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW; Bierlaire (2005) Functional approximations to alternative-specific constants in time-period choice-modelling, Transportation and Traffic Theory: Flow, Dynamics and Human Interaction, 16th International Symposium on Transportation and Traffic Theory, College Park, MA. .
  • Hess S; Adler T; Polak JW (2005) Computing Willingness to pay indicators for air travellers from SP survey data, 9th Air Transport Research Society Word Conference, Rio de Janeiro. .
  • Battersby B; Hess S (2005) Accounting for seat capacity and availability constraints in modelling air-travel choice behaviour, 9th Air Transport Research Society Word Conference, Rio de Janeiro. .
  • Hess S; Bolduc D; Polak JW (2005) Random Covariance Heterogeneity in Discrete Choice Models, European Regional Science Conference, Amsterdam. .
  • Hess S (2005) Analysing air travel choice behaviour in the Greater London area, European Regional Science Conference, Amsterdam. .
  • Hess S (2005) Competition between London Airports, Meeting of the German Aviation Research Society, Vienna. .
  • Hess S; Bierlaire M; Polak JW (2005) Discrete mixtures of GEV models, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Bierlaire M; Polak JW (2005) Mixed GEV modelling of mode-choice, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S; Bierlaire M; Polak JW (2005) Interpretation of counter-intuitively signed value of travel-time saving estimates, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess A; Axhausen KW (2005) Distributional assumptions in the representation of random taste heterogeneity, 5th Swiss Transport Research Conference, Monte Verita, Ascona. .
  • Hess S (2005) Modelling airport choice in the London area, Annual UTSG meeting, Bristol. .
  • Hess S; Polak JW (2005) Cross-Nested Logit modelling of the combined choice of airport, airline and access-mode, European Transport Conference, Strasbourg. .
  • Hess S; Bierlaire M; Polak JW (2005) Discrete mixtures of random utility models, European Transport Conference, Strasbourg. .
  • Hess S; Bolduc D; Polak JW (2005) Random Covariance Heterogeneity in Discrete Choice Models, European Transport Conference, Strasbourg. .
  • Rohr C; Daly A; Hess S; Bates J; Polak JW; Hyman G (2005) Modelling Time Period Choice: Experience from the UK and the Netherlands, European Transport Conference, Strasbourg. .
  • Hess S; Train KE; Polak JW (2004) On the use of randomly shifted and shuffled uniform vectors in the estimation of a Mixed Logit model for vehicle choice, 83rd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Polak JW (2004) Mixed Logit estimation of parking type choice, 83rd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Polak JW (2004) An analysis of parking behaviour using discrete choice models calibrated on SP datasets, European Regional Science conference, Porto. .
  • Hess S (2004) Mixed Logit modelling of airport choice in the San Francisco Bay area, 8th Air Transport Research Society Word Conference, Istanbul. .
  • Hess S (2004) An analysis of airport-choice behaviour using the Mixed Multinomial Logit model, European Regional Science Conference, Porto. .
  • Hess S (2004) A model for the joint analysis of airport, airline, and access-mode choice for passengers departing from the San Francisco Bay area, European Transport Conference, Strasbourg. .
  • Hess S; Bierlaire M; Polak JW (2004) Development and Application of a Mixed Cross-Nested Logit model, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW; Daly A; Hyman G (2004) Departure Time and Mode Choice, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW (2004) On the use of Discrete Choice Models for Airport Competition with Applications to the San Francisco Bay area Airports, 10th triennial WCTR conference, Istanbul. .
  • Hess S; Polak JW; Bierlaire M (2004) Development of a Mixed Cross-Nested Logit Model with an Application to Mode Choice Modelling, 10th triennial WCTR conference, Istanbul. .
  • Hess S; Polak JW (2004) Recent developments in the area of simulation-based discrete choice models, Workshop in computational econometrics and statistics, Neuchatel University. .
  • Hess S (2004) Understanding airport-choice behaviour, German Aviation Research Society, Technical University, Bremen. .
  • Hess S; Polak JW (2004) Development and application of a model for airport competition in multi-airport regions, Annual UTSG meeting, Newcastle upon Tyne. .
  • Jotisankasa A; Hess S; Polak JW (2004) On the effects of alternative discretisation strategies in departure time choice modelling, Annual UTSG meeting, Newcastle upon Tyne. .
  • Hess S; Train KE; Polak JW (2004) On the use of randomly shifted and shuffled uniform vectors in the estimation of a Mixed Logit model for vehicle choice, 83rd Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW (2004) Mixed Logit estimation of parking type choice, 83rd Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW (2004) An analysis of parking behaviour using discrete choice models calibrated on SP datasets, European Regional Science conference, Porto. .
  • Hess S (2004) Mixed Logit modelling of airport choice in the San Francisco Bay area, 8th Air Transport Research Society Word Conference, Istanbul. .
  • Hess S (2004) An analysis of airport-choice behaviour using the Mixed Multinomial Logit model, European Regional Science Conference, Porto. .
  • Hess S; Polak JW (2004) On the use of Discrete Choice Models for Airport Competition with Applications to the San Francisco Bay area Airports, 10th triennial WCTR conference, Istanbul. .
  • Hess S; Polak JW; Bierlaire M (2004) Development of a Mixed Cross-Nested Logit Model with an Application to Mode Choice Modelling, 10th triennial WCTR conference, Istanbul. .
  • Hess S; Polak JW (2004) Recent developments in the area of simulation-based discrete choice models, Workshop in computational econometrics and statistics, Neuchatel University. .
  • Hess S (2004) Understanding airport-choice behaviour, German Aviation Research Society, Technical University, Bremen. .
  • Hess S; Polak JW (2004) Development and application of a model for airport competition in multi-airport regions, Annual UTSG meeting, Newcastle upon Tyne. .
  • Jotisankasa A; Hess S; Polak JW (2004) On the effects of alternative discretisation strategies in departure time choice modelling, Annual UTSG meeting, Newcastle upon Tyne. .
  • Hess S (2004) A model for the joint analysis of airport, airline, and access-mode choice for passengers departing from the San Francisco Bay area, European Transport Conference, Strasbourg. .
  • Hess S; Bierlaire M; Polak JW (2004) Development and Application of a Mixed Cross-Nested Logit model, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW; Daly A; Hyman G (2004) Departure Time and Mode Choice, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW; Daly AJ (2003) On the performance of shuffled Halton sequences in the estimation of discrete choice models, European Transport Conference, Strasbourg. .
  • Hess S; Polak JW (2003) An Analysis of the Effects of Speed Limit Enforcement Cameras on Accident Rates, 82nd Annual Meeting of the Transportation Research Board, Washington, D.C. .
  • Hess S; Polak JW (2003) An alternative method to the scrambled Halton sequence for removing correlation between standard Halton sequences in high dimensions, European Regional Science Conference, Jyv�skyl�. .
  • Hess S (2003) The Effectiveness of U.K. Speed Camera Programs”, SET Annual Reception, Houses of Parliament, London. .
  • Hess S; Polak JW (2003) An Analysis of the Effects of Speed Limit Enforcement Cameras on Accident Rates, 82nd Annual Meeting of the Transportation Research Board .
  • Hess S; Polak JW (2003) An alternative method to the scrambled Halton sequence for removing correlation between standard Halton sequences in high dimensions, European Regional Science Conference, Jyv�skyl�. .
  • Hess S (2003) The Effectiveness of U.K. Speed Camera Programs”, SET Annual Reception, Houses of Parliament, London. .

Other Publications

  • Aeron-Thomas AS; Hess S (2005) Red-light cameras for the prevention of road traffic crashes., Cochrane database of systematic reviews (Online : Update Software), .

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