持続可能な社会・経済研究会セミナーシリーズ
What's Research Workshop on Sustainable Society at Musashi University?
現在、経済学、政治科学など、社会科学全般で様々な分野で持続可能な社会に関して政策提言が行われていますが、それぞれの提案されている施策の相互作用や関係性を十分に理解する統合的な研究活動はいまだに不十分と言わざるを得ません。真の持続可能な社会実現のためにも、国際的な研究活動をもととした多角的な分析視野と、学際的な研究知見を併せ持つ、より俯瞰的な研究が社会的に要請されていると言えます。そのため持続可能性を担保する社会・経済実現のため、学術領域を越えた議論を創発するとともに、国際的な研究協力の加速化を目的として、武蔵大学における研究会として、本研究会は設立されました。
Currently, policy recommendations regarding a sustainable society are being made in various fields within social sciences such as economics and political science. However, it must be said that integrated research activities, which fully understand the interactions and relationships between the proposed measures, are still insufficient. For the realization of a truly sustainable society, a more comprehensive research approach is socially demanded, which combines multidimensional analysis based on international research activities with interdisciplinary research findings. Therefore, this research group was established at Musashi University with the aim of fostering cross-disciplinary discussions to ensure sustainability in society and the economy, as well as to accelerate international research cooperation.
セミナー幹事:神林龍、田中健太、広田啓朗、釣雅雄、笠松怜史、佐藤宇樹、原朋弘、阿部景太
Workshop organizers: Ryo Kambayashi, Kenta Tanaka, Haruaki Hirota, Masao Tsuri, Satoshi Kasamatsu, Takaki Sato, Tomohiro Hara, Keita Abe
発表言語 (Language):日本語/English (スピーカーが選択/Speaker's choice)
鈴木 崇文 (愛知淑徳大学ビジネス学部 )
Takafumi Suzuki (Faculty of Business, Aichi Shukutoku University)
日時 date:2026年6月25日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:Information Constraints, Benchmark Dispersion, and Border Misreporting: Evidence from Japanese Customs Data
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :Border taxes are effective only insofar as customs can verify declarations at the border. We study whether higher border tax rates induce importers to understate the declared tax base, and whether such responses are concentrated where customs has less information from past transactions. Using confidential Japanese customs microdata linked to UN Comtrade, we construct HS6 product-partner-year cells for 2014-2021 and estimate how tax rates affect the trade-cost-adjusted log gap between partner-reported exports and Japan-reported imports, a reduced-form proxy for trade misreporting. The average semi-elasticity of this gap with respect to the tax rate is positive but statistically indistinguishable from zero. Yet the average masks sharp heterogeneity: responses are close to zero in information-rich lanes but economically meaningful in thin-information lanes, and somewhat larger where implied-unit-value dispersion is greater. A decomposition of mirror-data outcomes shows that the tax-responsive component of these discrepancies appears mainly in quantities rather than in implied unit values. The results imply that, even in a high-capacity setting, the effective incidence of border taxes depends on the lane-level information available for enforcement.
Thomas Monnier (一橋大学社会科学高等研究院 )
Thomas Monnier (Hitotsubashi Institute for Advanced Study)
日時 date:2026年7月2日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:The Informality Trade-Off: Wages and Rural-Urban Migration in South Africa
発表言語 language:English
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :In rapidly urbanizing countries, many urban inhabitants work in the informal sector. Should policy makers try to shrink it? To answer this question, I develop a general-equilibrium model of rural-urban migration based on frictional job search and matching. A key novelty of this approach is to combine migration choice of workers with occupational choice across formal and informal labour markets. I first estimate my model with a South African panel of workers. I find that the urban informal sector serves as a stepping-stone to urban formal jobs. This also makes it a valuable outside option for urban formal workers. Then, I simulate formalization policies by tripling the expected cost of being inspected for urban informal firms. I find a decline in informal employment and wages that is not associated with job destruction, but with wage cuts in the formal sector. This is because urban formal firms now have more labour market power. As a result, cities become less attractive. This is exacerbated by the response of rural firms that offer higher wages and retain potential migrants: the urban population share falls by 4%. Overall, the decline in urban informality improves the allocation of labour, both across sectors in urban areas and towards more productive firms in rural areas, at the cost of lower workers’ welfare.
西田成佑 (ウィスコンシン大学 マディソン校)
Masahiro Nishida (University of Wisconsin-Madison )
日時 date:2026年7月16日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:Product-Harm Crises and Intermediaries in the Used Car Market
発表言語 language:English
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract : Product-harm crises have long been studied in primary markets, yet in many durable-goods categories consumers purchase predominantly through intermediaries in secondary markets. This paper examines how a public information shock to product quality affects market outcomes in dealer-intermediated used car markets, focusing on the 2016 Mitsubishi Motors fuel economy scandal in Japan. Four affected kei car models were sold under both Mitsubishi and Nissan badges via an OEM arrangement; this setting allows me to separate the scandal's effect on brand reputation from its underlying product-quality content. Using data on dealer-to-dealer wholesale auto auctions and dealer-to-household online retail listings, I compare affected car models to other kei cars before and after the disclosure. In wholesale markets, transaction prices fall similarly for both brands. In retail markets, however, Nissan-branded affected vehicles experience substantially smaller price declines than Mitsubishi-branded affected vehicles. Dealer affiliation further shapes retail responses: dealers affiliated with the affected brands show smaller price declines than independent used car dealers. Independent dealers cut prices sharply for Mitsubishi-branded affected vehicles, whereas for Nissan-branded affected vehicles they respond through a combination of smaller price cuts, longer holding times, and reallocation to alternative sale channels. Finally, I present a simple theoretical model to explain the mechanism underlying this heterogeneity across brands and dealer affiliation.
向山 敏彦 (ジョージタウン大学 経済学部)
Toshihiko Mukoyama (Department of Economics, Georgetown University)
日時 date:2026年7月23日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
山本 鉄平 (早稲田大学 政治経済学術院)
Teppei Yamamoto ( Faculty of Political Science and Economics, Waseda University )
日時 date:2026年9月10日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
濱秋 純哉 (法政大学 経済学部)
Junya Hamaaki( Faculty of Economics, Hosei University )
日時 date:2026年9月17日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
上田 晃三 (早稲田大学 政治経済学術院)
Kozo Ueda( Faculty of Political Science and Economics, Waseda University )
日時 date:2026年10月8日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
渡辺 安虎 (東京大学 大学院経済学研究科、公共政策大学院)
Yasutora Watanabe( Faculty of Economics and Public Policy, University of Tokyo )
日時 date:2026年10月22日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
Sueyoul Kim (Korea Development Institute)
日時 date:2026年10月29日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
高山 太輔 ( 京都大学 大学院農学研究科)
Taisuke Takayama( Graduate School of Agriculture, Kyoto University )
日時 date:2026年11月5日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
今井 泰佑( 大阪大学 社会経済研究所)
Taisuke Imai( Institute of Social and Economic Research, The University of Osaka )
日時 date:2026年11月19日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
野津 成希( 大阪大学 大学院国際公共政策研究科)
Naruki Notsu ( Osaka School of International Public Policy, University of Osaka )
日時 date:2026年11月26日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA
小笠原 浩太( 東京科学大学工学院)
Kota Ogasawara ( Department of Industrial Engineering and Economics, Institute of Science Tokyo )
日時 date:2026年12月10日(木 Thurs) Google Calendar
時間 time:16:30-18:00
タイトル title:TBA
発表言語 language:TBA
会場 venue:教授研究棟 03-G会議室 Room 03-G in Research Building
概要 abstract :TBA