CV

Kei Ikegami

Lecturer (tenured), Yokohama City University
Email: ikegami.kei.pr [at] yokohama-cu.ac.jp
Website: keiikegami.github.io

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Economist working in empirical industrial organization, econometrics, and market design. My research combines Japanese platform, healthcare, and procurement data with structural estimation and counterfactual policy analysis.

Academic Appointments

• Yokohama City University, Lecturer (tenured), April 2026–present
• University of Tokyo, Research Assistant Professor at UTMD, 2025–2026

Education

• PhD in Economics, New York University, 2020–2025
• MA in Economics, The University of Tokyo, 2018–2020
• BA in Economics, The University of Tokyo, 2013–2018

Research Fields

• Industrial Organization
• Econometrics
• Market Design
• Auctions and Matching

Publications

• Kei Ikegami, Ken Onishi, and Naoki Wakamori,
  Competition-Driven Physician-Induced Demand,
  Journal of Health Economics, Vol. 79, September 2021

• Kei Ikegami, Kyohei Okumura, and Takumi Yoshikawa,
  A Simple, Fast, and Safe Mediator for Congestion Management,
  AAAI 2020 (Oral and Poster presentation)

Working Papers

• Policy Learning by a Magician

• Remembering the Shogun Era: Long-Run Effects of a Catastrophe on Policymaking over 160 years
  with Hikaru Kawarazaki
  Supplemental Appendix

• Who Is Shown to Whom? Sorting, Screening, and Exposure Design on a Two-Sided Matching Platform
  Accepted for WINE 2026

• Caps vs. Prices: Regulating Matching Markets with Distributional Disparities
  with Atsushi Iwasaki, Akira Matsushita, and Kyohei Okumura
  EC 2025 (Exemplary Paper Award, Empirics Track)

• Joint Venture Formation in Procurement Auctions
  with Ken Onishi and Naoki Wakamori

Work in Progress

• The Signal Magician: Online Allocation with Imperfect Screening
  with Shuhei Otani and Yuta Nakamura

• Bargaining over Leasing Contracts

• Wage Stagnation in Daycare Industry: A Two-Sided Market Perspective
  with Kan Kuno

• Recommendation and Long-run Matching Outcomes
  Presented at SWET 2026

• Procuring Hunting Effort

Research and Industry Experience

• CyberAgent, Research Intern, 2023
• Center for Research and Education in Program Evaluation (CREPE), Trainee, 2018–2020
• Preferred Networks, Intern and Part-time Engineer, 2018–2019

Selected Presentations

Upcoming

• 2026: The Chinese University of Hong Kong (CUHK) seminar; WINE 2026; APIOC 2026

Recent

• 2026: SWET, SSCW, MATCH-UP, IIOC
• 2025: ESWC, EC 2025, HKUST(GZ), Penn State, IIOC
• 2024: UTMD Rising Stars in Market Design, APIOC, JEMIOW, NYU seminars, AEA Annual Meeting
• 2023: Yokohama National University, Otaru University of Commerce, JEMIOW, KCL (QPE Workshop), NYU Student Econometrics Lunch
• 2022: APIOC, Waseda University Applied Econometrics Conference

Professional Service

• Reviewer, ACM Conference on Economics and Computation (EC)

Teaching

Current Courses

• Econometrics (Undergraduate), Yokohama City University
• Econometrics (Graduate), Yokohama City University

Previous Teaching

• Teaching Assistant, Econometrics (PhD), New York University, 2021–2022
• Teaching Assistant, Econometrics (MS in Quantitative Economics), New York University, 2022–2023

Honors and Fellowships

• MacCracken Fellowship, 2020–2025
• CREPE Scholarship Program, 2018–2020
• Distinguished Graduation Thesis

Grants

• JSPS KAKENHI, Grant-in-Aid for Early-Career Scientists
  Principal Investigator, April 2026–March 2029
  Understanding Firm and Consumer Behavior in the Healthcare Industry, Grant No. JP26K16347

• IPA MITOU Advanced Program
  FY2019, JPY 10,000,000 (project total)
  Development of CRAB: A Congestion Control System Using Mechanism Design and Machine Learning
  with Akira Matsushita and Kyohei Okumura

Skills

• Programming: Python, R, Julia, Stata
• Languages: Japanese (native), English (fluent)
• Citizenship: Japan