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Challenges in credibly estimating the travel demand effects of mobility services

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  • Wen, Xiao
  • Ranjbari, Andisheh
  • Qi, Fan
  • Clewlow, Regina R.
  • MacKenzie, Don

Abstract

Mobility services including carsharing and transportation network company (TNC) services have been growing rapidly in North America and around the world. Measuring the effects of these services on traveler behavior is challenging because the results of any such analysis are sensitive to how (1) outcomes are measured and (2) counterfactuals are constructed. The lack of good control groups or randomization of assignment leaves lingering uncertainty over the contributions of selection bias and treatment effects to reported differences in travel behavior between users and non-users of these services. This paper reports on two approaches for measuring the effects of mobility service adoption on travel rate and car ownership. We first tried a pretest-posttest randomized encouragement experiment to deal with the shortcomings of poor control groups. Then, we turned to the approach of self-reported effects based on hypothetical controls to investigate whether variations in survey question presentation could influence respondents’ answers and thus lead to changes in estimated effects. The data to conduct this study came from two sources: a panel survey administered by the authors at the University of Washington (UW), and a survey by Populus Technologies, Inc. (Populus). Various statistical tests were applied to analyze the data, and the results highlight the pivotal role that the research design plays in influencing the outcomes, and manifest the fundamental challenge of establishing credible estimates of the causal effects of adopting mobility services on travel behaviors.

Suggested Citation

  • Wen, Xiao & Ranjbari, Andisheh & Qi, Fan & Clewlow, Regina R. & MacKenzie, Don, 2021. "Challenges in credibly estimating the travel demand effects of mobility services," Transport Policy, Elsevier, vol. 103(C), pages 224-235.
    • Handle: RePEc:eee:trapol:v:103:y:2021:i:c:p:224-235
    DOI: 10.1016/j.tranpol.2021.02.001
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    1. Rayle, Lisa & Dai, Danielle & Chan, Nelson & Cervero, Robert & Shaheen, Susan, 2016. "Just a better taxi? A survey-based comparison of taxis, transit, and ridesourcing services in San Francisco," Transport Policy, Elsevier, vol. 45(C), pages 168-178.
    2. Abhijit Vinayak Banerjee, 2020. "Field Experiments and the Practice of Economics," American Economic Review, American Economic Association, vol. 110(7), pages 1937-1951, July.
    3. Keele, Luke, 2015. "The Statistics of Causal Inference: A View from Political Methodology," Political Analysis, Cambridge University Press, vol. 23(3), pages 313-335, July.
    4. Quinn McNemar, 1947. "Note on the sampling error of the difference between correlated proportions or percentages," Psychometrika, Springer;The Psychometric Society, vol. 12(2), pages 153-157, June.
    5. Stasko, Timon H. & Buck, Andrew B. & Oliver Gao, H., 2013. "Carsharing in a university setting: Impacts on vehicle ownership, parking demand, and mobility in Ithaca, NY," Transport Policy, Elsevier, vol. 30(C), pages 262-268.
    6. Esther Duflo, 2020. "Field Experiments and the Practice of Policy," American Economic Review, American Economic Association, vol. 110(7), pages 1952-1973, July.
    7. Marlon G. Boarnet & Sharon Sarmiento, 1998. "Can Land-use Policy Really Affect Travel Behaviour? A Study of the Link between Non-work Travel and Land-use Characteristics," Urban Studies, Urban Studies Journal Limited, vol. 35(7), pages 1155-1169, June.
    8. West, S.G. & Duan, N. & Pequegnat, W. & Gaist, P. & Des Jarlais, D.C. & Holtgrave, D. & Szapocznik, J. & Fishbein, M. & Rapkin, B. & Clatts, M. & Mullen, P.D., 2008. "Alternatives to the randomized controlled trial," American Journal of Public Health, American Public Health Association, vol. 98(8), pages 1359-1366.
    9. Fisher, Robert J, 1993. "Social Desirability Bias and the Validity of Indirect Questioning," Journal of Consumer Research, Journal of Consumer Research Inc., vol. 20(2), pages 303-315, September.
    10. Rotaris, Lucia & Danielis, Romeo & Maltese, Ila, 2019. "Carsharing use by college students: The case of Milan and Rome," Transportation Research Part A: Policy and Practice, Elsevier, vol. 120(C), pages 239-251.
    11. repec:cdl:itsrrp:qt61346539 is not listed on IDEAS
    12. Georgina Santos, 2018. "Sustainability and Shared Mobility Models," Sustainability, MDPI, vol. 10(9), pages 1-13, September.
    13. Namazu, Michiko & Dowlatabadi, Hadi, 2018. "Vehicle ownership reduction: A comparison of one-way and two-way carsharing systems," Transport Policy, Elsevier, vol. 64(C), pages 38-50.
    14. repec:cdl:itsdav:qt82w2z91j is not listed on IDEAS
    15. Kim, Kyeongsu, 2015. "Can carsharing meet the mobility needs for the low-income neighborhoods? Lessons from carsharing usage patterns in New York City," Transportation Research Part A: Policy and Practice, Elsevier, vol. 77(C), pages 249-260.
    16. repec:cdl:itsrrp:qt60v8r346 is not listed on IDEAS
    17. repec:cdl:itsrrp:qt6xt6d5jv is not listed on IDEAS
    18. Johanna Kopp & Regine Gerike & Kay Axhausen, 2015. "Do sharing people behave differently? An empirical evaluation of the distinctive mobility patterns of free-floating car-sharing members," Transportation, Springer, vol. 42(3), pages 449-469, May.
    19. repec:cdl:uctcwp:qt5b76c5kg is not listed on IDEAS
    20. Namazu, Michiko & MacKenzie, Don & Zerriffi, Hisham & Dowlatabadi, Hadi, 2018. "Is carsharing for everyone? Understanding the diffusion of carsharing services," Transport Policy, Elsevier, vol. 63(C), pages 189-199.
    21. Elliot Martin & Susan Shaheen, 2011. "The Impact of Carsharing on Public Transit and Non-Motorized Travel: An Exploration of North American Carsharing Survey Data," Energies, MDPI, vol. 4(11), pages 1-21, November.
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    2. Aguilera-García, Álvaro & Gomez, Juan & Antoniou, Constantinos & Vassallo, José Manuel, 2022. "Behavioral factors impacting adoption and frequency of use of carsharing: A tale of two European cities," Transport Policy, Elsevier, vol. 123(C), pages 55-72.

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