Research

Working Papers

Robust Learning with Private Information
Kyohei Okumura
     extended abstract at WINE 2026

Testing the Fairness-Accuracy Improvability of Algorithms
Eric Auerbach, Annie Liang, Kyohei Okumura, and Max Tabord-Meehan
[+slides(20min)]
     R&R at Journal of Political Economy

Caps vs. Prices: Regulating Matching Markets with Distributional Disparities
Kei Ikegami, Atsushi Iwasaki, Akira Matsushita, and Kyohei Okumura,
[+slides(18min)]
     New draft, August 2026
     extended abstract at EC’25 (Exemplary Empirics Track Paper)
     presented at MATCH-UP 2026

Accepted and Published Papers

An Economic Analysis of Difficulty Adjustment Algorithms in Proof-of-Work Blockchain Systems
[+code] [+talk]
Shunya Noda, Kyohei Okumura, and Yoshinori Hashimoto,
     International Economic Review, 2026

Algorithm Design: A Fairness-Accuracy Frontier
Annie Liang, Jay Lu, Xiaosheng Mu, and Kyohei Okumura
     Journal of Political Economy, 2026

Counterfactual Learning with General Data-generating Policies
Yusuke Narita, Kyohei Okumura, Kohei Yata, and Akihiro Shimizu
     The 37th AAAI Conference on Artificial Intelligence, 2023

A Simple, Fast, and Safe Mediator for Congestion Management
Kei Ikegami, Kyohei Okumura, and Takumi Yoshikawa
     The 34th AAAI Conference on Artificial Intelligence, 2020