Congratulations on your graduations, Yvonne, Johan, Silvia, Diana, and Monir san!
We look forward to your continued success!!
The following paper is now available online!
Watanabe, H., Chikaraishi, M., Maruyama, T. (2021) How different are daily fluctuations and weekly rhythms in time-use behavior across urban settings? A case in two Japanese cities, Travel Behavior and Society, Vol. 22, 146-154.
For designing and evaluating the impacts of emerging mobility services, we need activity-based demand systems considering multi-week activity patterns and their variations. This study explored the inter- and intra-individual variations of time use in leisure activities during a non-working day. Specifically, the workday time-use impact on non-working-day time-use and their variations across two Japanese cities were examined in a metropolitan city (Yokohama) and a provincial city (Matsuyama). We used panel multiple discrete–continuous extreme value (MDCEV) models with five-week GPS-based data in the two cities. The results demonstrated the significant relationships between workday time-use and non-working day time-use (i.e., salient weekly rhythms) in Yokohama, but not in Matsuyama. For example, in Yokohama, (1) participants with long-time shopping on workday spent more time on recreation and less time on shopping on non-working day and (2) long-time workers on workday spent more time shopping on non-working days. Moreover, we clarified that workday time-use explained large portions of inter-individual variations in Yokohama while intra-individual variations were dominant in Matsuyama. It indicates that inhabitants in Yokohama were more affected by the time-use on workdays. In addition, activity time-use patterns in Matsuyama were more random than Yokohama since inhabitants in Matsuyama could take more flexible activity time-use patterns. Understanding such heterogeneous activity patterns will be crucial in developing and evaluating new mobility services in the future.