Upcoming Seminars

場所：2号館11階経済学部会議室B

Venue: 11th Floor, Bldg. No.2 Meeting Room B 

幹事/Organizer：長谷部拓也/Takuya Hasebe

言語/Language：英語/English

要旨/Abstract: Shared care, in which children live with both parents after separation, has become an increasingly common post-separation family arrangement across Europe, often celebrated as a success story of gender equality and involved fatherhood. Yet its growing prevalence raises important questions about inequality, family well-being, and the capacity of welfare states to respond to changing family forms.

Drawing on findings from a comparative European research project, this presentation shows the social and economic implications of shared care after separation, with particular attention to inequalities in access to shared care and its consequences for parents and children. The presentation also introduces the Finnish institutional, legal, and policy framework governing child custody and shared care. It concludes by discussing how family policies can better reflect the realities of children growing up across two parental households.

場所：2号館11階経済学部会議室B

Venue: 11th Floor, Bldg. No.2 Meeting Room B 

幹事/Organizer：蓬田守弘/Morihiro Yomogida

言語/Language：英語/English

要旨/Abstract: This paper establishes that roughly 40 percent of all trade occurs within multiproduct transactions (MPTs). We document four empirical patterns: (i) MPTs involve few products and have small transaction sizes; (ii) the likelihood of an MPT decreases with firm size; (iii) this likelihood increases with transaction size; and (iv) importers engaging in MPTs source from relatively few suppliers. We propose a model of international sourcing rationalizing these features of the data. The model predicts that trade cost reductions leads to a reduction in MPTs, sourcing from a wider set of suppliers, and additional input cost reductions, reinforcing gains from trade.

場所：2号館11階経済学部会議室B

Venue: 11th Floor, Bldg. No.2 Meeting Room B 

幹事/Organizer：長谷部拓也/Takuya Hasebe

言語/Language：英語/English

要旨/Abstract: This paper examines how local societies and economies recover from prolonged vacancy induced by post-disaster evacuation orders. Especially, we focus on the long-run effects of post-disaster reconstruction speed under basic quality assurance. Using 500-meter grid data from areas subject to evacuation orders following the Fukushima nuclear accident, we employ a two-stage least squares strategy to estimate the effects of reconstruction speed on economic activity, population, and land use. We find no statistically significant effect on industrial production value, but substantial impacts on the spatial distributions of population and economic activities. A decade after the disaster, these spatial distributions reflect both the persistence of pre-disaster agglomerations and the emergence of new business hubs driven by heterogeneous reconstruction speeds. However, the influence of pre-disaster agglomerations diminishes with recovery delays, reaching zero at a threshold corresponding to approximately six years. At the household level, slower reconstruction exacerbates spatial fragmentation: isolated households do not return, while those who were not isolated before the disaster become newly isolated. Finally, these spatial shifts yield divergent implications for future risks: slower recovery increases abandoned land, potentially heightening environmental risks, yet overall population exposure to mapped hazards declines at the prefecture level without deteriorating within the evacuation zones. 

場所：2号館11階経済学部会議室B

Venue: 11th Floor, Bldg. No.2 Meeting Room B 

幹事/Organizer：蓬田守弘/Morihiro Yomogida

言語/Language：英語/English

要旨/Abstract: TBA