Investigating changes in within-person effects between attitudes and travel behaviour during the COVID-19 pandemic
R.M. Faber (KiM: Kennisinstituut voor Mobiliteitsbeleid )
Mathijs de Haas (TU Delft - Transport and Planning, KiM: Kennisinstituut voor Mobiliteitsbeleid )
E. J.E. Molin (TU Delft - Transport and Logistics)
Maarten Kroesen (TU Delft - Transport and Logistics)
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Abstract
Attitudes have been used as explanatory variables of travel behaviour for decades, typically under the assumption that there is a causal effect of attitudes on behaviour. However, recent research has shown that the relationship between attitudes and travel behaviour is bi-directional. In this study we use a longitudinal modelling technique on panel data to 1) separate within-person effects from between-person associations and 2) test whether the within-person effects changed during the COVID-19 pandemic. We find that the within-person effects were weaker during the pandemic than they were before the pandemic. In addition, the within-person effects were much smaller than would be expected based on methods that do not separate within-person effects from between-person associations. This means that researchers should be careful when basing policy recommendations on cross-sectional correlations between attitudes and behaviour for two reasons: first, the problem of endogeneity, and second, the highly relevant separation of within-person effects from between-person relations.
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