About Me

I am a postdoctoral researcher at the University of Chicago Harris School of Public Policy.

Fields of Concentration

Labor Economics


yasai [at] uchicago.edu


Effects of Subsidized Childcare on Mothers' Labor Supply Under a Rationing Mechanism, Labour Economics, Volume 55, 2018 (with Ryo Kambayashi and Shintaro Yamaguchi)

How Does Early Childcare Enrollment Affect Children, Parents, and Their Interactions?, Labour Economics, Volume 55, 2018 (with Ryo Kambayashi and Shintaro Yamaguchi)

Parental Leave Reforms and the Employment of New Mothers: Quasi-experimental Evidence from Japan, Labour Economics, Volume 36, 2015

Childcare Availability, Household Structure, and Maternal Employment, Journal of the Japanese and International Economies, Volume 38, 2015 (with Ryo Kambayashi and Shintaro Yamaguchi)

Working Papers

Temporary Work Contracts and Female Labor Market Outcomes, with Dmitri Koustas

An Analysis of the Labor Supply of Childcare Providers, with Akiei Jibiki

Costs of Employment and Flexible Labor Demand: Evidence from Maternity and Parental Leave Reforms in media: VoxEU

Work in Progress

Overtime premium and hours of work: Lessons from the mandatory increase in the overtime premium

Does Childcare Under Age 3 Matter?: Evidence on Maternal Labor Supply and Early Childhood Development from an Expansion of Subsidies


Instructor, the University of Chicago Harris School of Public Policy, 2019, 2020, 2021

Lecturer, Labor Economics, Department of Economics, University of California Berkeley, summer 2017, 2018

Instructor, R Training Workshop, School of Political Science and Economics, Waseda University, 2018, 2019, 2020

Invited lecture, Demographic Change in Japan, Graduate School of International Corporate Strategy, Hitotsubashi University, Japan, March 2017

Instructor, Statistics, Faculty of Humanities, Law and Economics, Mie University, Japan, 2013

Instructor, Information Processing in Economics, Department of Economics, Kanagawa University, Japan, 2010-2012

Conference and Seminar Presentations

2021: ASSA Annual Meeting, EUSP Economic Seminar

2020: EALE SOLE AASLE World Conference, ASSA Annual Meeting, Midwest Economics Association

2019: NORC University of Chicago, SOLE, Western Economic Association, Labor and Employment Relations Association (LERA), Empirical Microeconomics Workshop University of Tokyo

2018: Kansai Labor Workshop, Tokyo Keizai University

2017: 10th Trans Pacific Labor Seminar, Asian and Australasian Society of Labour Economics, Seoul National University

2016: European Economic Association, ASSA Annual Meeting (poster), University of California Berkeley, California State University East Bay

2015: 4th SOLE/EALE World Conference, 8th Trans Pacific Labor Seminar, Hitotsubashi Summer Institute, Yokohama National University, OEIO conference, Tohoku University

2014: 84th Annual Meetings Southern Economic Association, 7th Trans Pacific Labor Seminar, Sogang University, Labour and Public Policy Seminars Aarhus University

2013: 8th Applied Econometrics Conference Hitotsubashi University, Japan(Best Paper Award), 25th annual Conference of the European Association of Labour Economists, 18th Society of Labor Economists meetings(poster), Economic Science Association Asia-Pacific Conference

Other Skills

Karate Black Belt


Google Scholar Citation



日本語の論文(Publications in Japanese)