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X vs. Y: An Analysis of Intergenerational Differences in Transport Mode Use Among Young Adults

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  • Krueger, Rico
  • Rashidi, Taha H.
  • Vij, Akshay

Abstract

Recent research has contrasted the travel patterns of young adults of Generation Y (or, synonymously, the Millennial Generation) with the travel patterns of earlier generations of young adults such as those belonging to Generation X. Young adults of Generation Y are found to drive less and, in some contexts, are found to exhibit more multimodal travel patterns and to use public transit more often. Potential causes for these observed shifts in transport mode use have also been theorised: One view is that period effects in the form of contemporaneous changes in socio-cultural, socio-economic and socio-technical factors are responsible for the observed shifts in transport mode use; another view is that members of Generation Y have inherently different preferences and values due to formative socio-cultural, socio-economic and historical experiences. Motivated by this yet-to-be-resolved dialectic, this paper uses a hierarchical Bayesian multivariate Poisson log-normal model to examine intergenerational differences in transport mode use among young adults. The model is applied to 23 waves of the German Mobility Panel and captures between-cohort and between-period variation of parameters of interest. The trained model informs a counterfactual prediction exercise aiming to decompose intergenerational differences in transport mode use into demography-, cohort-, and period-specific effects. Our findings suggest that all three sets of effects account for intergenerational differences in transport mode use, while the absolute and relative importance of each set of effects vary across transport modes. For the period from 1998 to 2016, two thirds of the decline in car use can be ascribed to period effects; nearly all of the increase in public transit use and 42% of the increase in bicycling can be ascribed to cohort effects.

Suggested Citation

  • Krueger, Rico & Rashidi, Taha H. & Vij, Akshay, 2018. "X vs. Y: An Analysis of Intergenerational Differences in Transport Mode Use Among Young Adults," SocArXiv unezy_v1, Center for Open Science.
    • Handle: RePEc:osf:socarx:unezy_v1
    DOI: 10.31219/osf.io/unezy_v1
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