The Urban Economics Workshop 2023
空間情報科学研究センター(CSIS)との共催ワークショップ

  • 2024年1月24日

対面とZoomを利用したハイブリッド開催について (In-person and Online Seminars Using Zoom)

本ワークショップは、対面とZoomを利用してのオンラインでの、ハイブリッド開催となります。 This seminar is held in-person and online.  以下の注意事項を必ずご確認のうえご準備をお願いいたします。
Urban Economics Workshop is held in-person and online using Zoom for the time being. Please read the following instruction for participation.

■ 対面会場 ■
東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall


※登録はこちらから(For registration)⇒ https://zoom.us/meeting/register/tJMtdOqhpzsqGNaJa-XZCnU4SivLKQIZHpFJ


※ 登録 (Registration)

事前登録が必須となります。 下記よりご登録いただくと、 ミーティングURLがemailで送付されます。 事前に、ご利用の端末にZoomアプリケーションのインストールをお済ませください。 (Zoomアカウントをお持ちの方は、emailにあるID, パスワードを使ってサインインして頂くことも可能です。)

Registration is required to join a seminar. Please register in advance at the following website so that detailed information containing meeting URL will be provided via email.  Please make sure to install ZOOM Cloud Meetings (application) on your computer or cell phone in advance. (If you have a Zoom account, sign-up using ID and password included in the email is also available.)

参加までの手順は下記より事前にご確認ください。 For more details, please see the following website.
日本語 ・ English

※ 注意 (Note)
参加者名には、ご自分の氏名をお使い下さい。 
Please register your full name when you participate.

※ セミナー中 (During Seminars)
ご自身の音声は、質疑応答時を除き、OFFにしてください。
Please mute your microphone during a speaker's talk except for Q&A session.

音声OFFの手順 (Muting Participants in Zoom)
日本語 ・ English  

 

担当教員 (Organizer):佐藤泰裕 (Yasuhiro Sato)

日時
2024年1月26日(金 Friday)13:00-15:00  ※時間に注意
場所
対面とZoomを使ったオンラインでのハイブリッド開催(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。
報告

修士論文報告会

13:00-13:30 報告者:田中瑞希
TBA
(主査:佐藤泰裕、副査:高橋孝明・古沢泰治)

13:30-14:00 報告者:牧野佑哉
TBA
(主査:佐藤泰裕:副査:高橋孝明・山口慎太郎)

14:00-14:30 報告者:Qingzhao YU
TBA
(主査:高橋孝明、副査:佐藤泰裕・川田恵介)

14:30-15:00 報告者:森本拓歩
TBA
(主査:川田恵介、副査:高橋孝明・佐藤泰裕)

Abstract
日時
2024年1月26日(金 Friday)15:30-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

芝 啓太(九州産業大学)
"After the Fukushima Daiichi Nuclear Accident, Land Prices Around Nuclear Power Plants in Kyushu"

Marcus Berliant (Washington University)
"Agglomeration in Purely Neoclassical and Symmetric Economies" with Axel Watanabe [Paper]

Abstract

芝 啓太(九州産業大学)
How land prices around nuclear power plant sites change after the Fukushima nuclear accident? This study focuses on two nuclear power plants (the Sendai and the Genkai nuclear power plants) in the Kyushu region of Japan. These two nuclear power plants were shut down after the Fukushima accident and then restarted. Using the Difference-in-Differences method, I find that land prices within a 30 km radius of the Genkai and the Sendai nuclear power plants have experienced decreases compared to other areas.

Marcus Berliant(Washington University)
This article demonstrates the emergence of agglomeration unaccompanied by any conventional explanatory factors such as scale economies, externalities or comparative advantages. Agglomeration forms out of inter-regional migration prompted by households seeking the type of consumers that complements their endowments. We construct a general equilibrium model with four commodities, four types of heterogeneous households, and linear production over two regions. Spatial sorting leads to an uneven distribution of people in equilibrium. This is driven by consumers' inclination to co-locate with a certain type of households who are endowed with the commodity they like to consume as is or to be used as an input to produce the commodity they like to consume. Our findings are robust against additional assumptions, including inter-regional trades and portability of endowments.

以下本年度終了分

 

日時
2023年4月21日(金 Friday)17:00-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

内藤徹(同志社大学)
"Regional Childcare Policy, Urbanization, and Population Dynamics" (with Hiroyuki Hashimoto)

Abstract
This study investigates the effects of the regional childcare policy on fertility, interregional demographics, and capital accumulation in a two-region OLG model with endogenous fertility and publicly provided childcare facilities. The key feature of the model is that one region has children who cannot enter the childcare facilities (waitlisted children), whereas the other region does not have these children. The use of childcare facilities is assumed to be assigned to parents with a positive probability that decreases with an increase in "effective" supply of the publicly provided childcare facilities. We demonstrate that tax increases to expand the total supply of public childcare facilities in the region with waitlisted children may reduce the probability of becoming a waitlisted child and increase the fertility rate in the region with waitlisted children. However, this is not applicable in all cases. The key factor shaping variation in outcomes is the regional migration, which is induced by tax increases that have negative effect on labor demand and positive effect on residence choice. The regional migration changes the number of parents in the region with waitlisted children, which is an indirect effect of the taxation policy.
日時
2023年5月19日(金 Friday)17:00-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

近藤恵介(神戸大学)
Ex ante evaluation of migration subsidy: Evidence from Japan

Abstract
This study proposes a simple framework for the ex ante evaluation of migration subsidy. Recently, the Japanese government initiated a migration subsidy program to promote urban-to-rural migration for regional revitalization under the economy with a monopolar concentration in Tokyo. The ex ante evaluation framework proposed in this study formulates the payback period of interregional migration as investment behavior. In the model, households compare the sum of the expected benefits available each year after migration with the lump-sum costs of migration, which are estimated with structural estimation using the interregional migration flow data. The migration subsidy leads to an incentive for interregional migration by reducing the payback period. This study finds that households incur different migration costs at each stage of life, implying that a uniformly determined migration subsidy may have different policy effects. Counterfactual simulations provide scientific insight into the potential impact of the migration subsidy program, helping policymakers determine the optimal amount under the budget constraint.
日時
2023年6月23日(金 Friday)17:00-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

中島賢太郎(一橋大学)
Geography of Business Interactions: Evidence from Business Card Exchange Data (with Shinnosuke Kikuchi, Shota Komatsu, Juan Nelson Martinez Dahbura, Takanori Nishida, Kensuke Teshima, and Junichi Yamasaki)

Abstract
Business to business interactions in a small distance have attracted research interests as the core of agglomeration forces, but observing directly business to business interactions has been challenging. We use unique business card exchange data from Eight, a business card organizer and professional networking platform, to overcome the challenge. We find that the distance reduces business card exchanges, more so for executives. We also find that the distance elasticity of business card exchanges is highly heterogeneous across industries and that the industry-level elasticity is correlated with a standard measure of industry-level agglomeration. Overall, our results suggest that business interactions are a key determinant of agglomeration.
日時
2023年7月14日(金 Friday)17:00-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

笹原 彰(慶應義塾大学)
"Immigration, imports, and (im)mutable Japanese labor markets." (with Yumin Sui and Emily Taguchi)

Abstract
This paper investigates the effects of globalization–measured by an increase in immigration and in imports from China–on labor market outcomes in Japan. We attempt to identify the causal links using a shift-share instrument based on previous settlement patterns of migrants for immigration shocks, and the one based on previous spatial allocation of sectoral employment for import shocks. The results suggest limited impact of these variables on wages, however, significant effects are found in the late 1990s, suggesting their interactions with Japan’s Lost Decade.
日時
2023年10月13日(金 Friday)17:00-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

*今回のセミナーは日本貿易振興機構アジア経済研究所との共催です。
This seminar is co-hosted by Institute of Developing Economies, Japan External Trade Organization (JETRO).

Jacques-François Thisse (Université catholique de Louvain、ジェトロ・アジア経済研究所)
"Foundations of Cities" (with Matthew A. Turner and Philip Ushchev)

Abstract
How do people choose work and residence locations when commuting is costly and productivity spillovers, increasing returns to scale, or first nature advantage, reward the concentration of employment? We describe such an equilibrium city in a simple geography populated by agents with heterogenous preferences over workplace-residence pairs. The behavior of equilibrium cities is more complex than previously understood. Increasing returns to scale and productivity spillovers can disperse employment in empirically relevant parts of the parameter space. Heterogeneous preferences concentrate employment and residence. These results have important implications for the study of agglomeration economies and the specification of quantitative spatial models.
日時
2023年11月10日(金 Friday)15:30-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

田所 篤(京都大学)
A welfare analysis of a monocentric city model under monopolistic competition with heterogeneous firms and variable elasticity of substitution preference (with Tadashi Morita and Kazuhiro Yamamoto)

岡本 千草(中央大学)
TBA

Abstract
田所 篤(京都大学)
In a monocentric city model under monopolistic competition among heterogeneous firms with a variable elasticity of substitution (VES) preference, we examine how the market reacts to an increase in city size and identify the features of the optimal city size. We show that firm heterogeneity affects the market’s reaction to city size expansion only through price decrease, with more productive firms experiencing larger declines than less productive firms. This non-uniform price decrease induces a shift in consumption/production toward varieties produced by more productive firms, eventually enhancing allocation efficiency and welfare. The magnitude of the welfare impact through this shift depends on the degree of firm heterogeneity, resulting in the optimal city size in market equilibrium (the second-best city size) being larger for cities where the distribution of productivity is less skewed toward lower levels. Meanwhile, in the context of the constant elasticity of substitution (CES) preference, where price/markup is independent of city size, firm heterogeneity does not affect the market’s reaction to city size expansion or the optimal city size. Incorporating firm heterogeneity in our VES framework also affects the characteristics of the second-best city size. Despite a distorted economy due to variable markup pricing, the second-best city size coincides with the first-best city size, and the Henry George Theorem holds in the second best, whereas these characteristics are no longer maintained when firms are homogeneous.
日時
2023年12月15日(金 Friday)15:30-18:30
場所
本ワークショップは、対面とZoomを利用してのオンラインとのハイブリッド開催となります。オンラインでは(事前登録制)となります。詳細は本ウェブサイト上部の説明をご確認ください。 

■対面会場: 東京大学本郷キャンパス 小島ホール第3セミナー室
in Seminar Room 3 on the 2nd floor of the Kojima Hall

This seminar is held in-person and online (registration is required for online participation). Please read the instruction at the top of this website for details.
報告

菊池 信之介(Massachusetts Institute of Technology)
"The Granular Origins of Agglomeration" with Daniel G O'Connor

内藤 巧(早稲田大学)
"The Small Open Economy in a Generalized Gravity Model" with Svetlana Demidova and Andrés Rodríguez-Clare

Abstract

菊池 信之介(Massachusetts Institute of Technology)
A few large firms dominate many local labor markets. This leaves workers vulnerable to firm-specific shocks. If one firm has a bad productivity shock in a small market, workers will be stuck with that unproductive employer, while in a large labor market, workers can move to another firm. Building on that insight, we present a model of local labor markets with a finite number of firms subject to idiosyncratic shocks. We show that there are increasing returns to scale which disappear as the number of firms goes to infinity. We also show that there can be under-entry of firms, especially in small markets. We then test the main mechanism in Japanese administrative data. We first confirm that payroll is less volatile in larger, less concentrated local labor markets. We also show that establishments with larger payroll shares respond less in adjusting employment to a demand shock. Finally, we propose a quantitative, granular model of economic geography with free entry of firms and costly mobility of workers across sectors and commuting zones that could be used to quantify the mechanism and do counterfactuals.

内藤 巧(早稲田大学)
To provide sharp answers to basic questions in international trade, a standard approach is to focus on a small open economy (SOE). Whereas the classic tradition is to define a SOE as an economy that takes world prices as given, in the modern trade literature a SOE is defined instead as one that takes foreign-good prices and export demand schedules as given. In this paper we develop a generalized gravity model that nests all of its standard microfoundations (e.g., Armington and Melitz-Pareto) and show how to take the limit so that an economy that becomes infinitesimally small behaves like a SOE. We then show how the resulting model of a SOE can be used to understand comparative statics and the optimal tariff in a way that is robust across the different microfoundations consistent with the gravity model.

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