sea

Tatsushi Oka

Affiliation

Education

Ph.D. (Economics) Boston University
M.A. (Economics) Osaka University

Academic Positions

Research Field

Theoretical and Applied Econometrics

Machine Learning

Publications

Estimation of Heterogeneous Treatment Effects Using Quantile Regression with Interactive Fixed Effects

with Ruofan Xu, Jiti Gao and Yoon-Jae Whang

Econometric Reviews, forthcoming

Econometric Reviews | Working Paper

Not Eliminate but Aggregate: Post-Hoc Control over Mixture-of-Experts to Address Shortcut Shifts in Natural Language Understanding

with Ukyo Honda, Peinan Zhang, Masato Mita

Transactions of the Association for Computational Linguistics, 2024, 12, pp. 1268–1289

TACL | Working Paper

Bivariate Distribution Regression with Application to Insurance Data

with Yunyun Wang and Dan Zhu

Insurance: Mathematics and Economics, 2023, 113, pp. 215-232

IME | Working Paper

Heterogeneous Impact of the Minimum Wage: Implications for Changes in Between- and Within-Group Inequality

with Ken Yamada

Journal of Human Resources, 2023, 58(1), pp. 335-362.

Journal of Human Resources | Working Paper

The Effect of Human Mobility Restrictions on the COVID-19 Transmission Network in China

with Wei Wei and Dan Zhu

PLoS One, July 2021

Inference Related to Common Breaks in a Multivariate System with Joined Segmented Trends with Applications to Global and Hemispheric Temperatures

with Francisco Estrada, Dukpa Kim, Pierre Perron

Journal of Econometrics, January 2020, 214(1), pp. 130-152.

Journal of Econometrics | Working Paper

Indirect Inference with a Non-Smooth Criterion Function

with David Frazier and Dan Zhu

Journal of Econometrics, October 2019, 212(2), pp. 623-645.

Journal of Econometrics | Working Paper

Quantile Treatment Effects in Difference in Differences Models under Dependence Restrictions and with only Two Time Periods

with Brantly Callaway and Tong Li

Journal of Econometrics, October 2018, 206(2), pp. 395-413.

Journal of Econometrics | Working Paper | R-package

Testing for Common Breaks in a Multiple Equations System

with Pierre Perron

Journal of Econometrics, May 2018, 204(1) pp. 66–85.

Journal of Econometrics | Working Paper

The Cross-Quantilogram: Measuring Quantile Dependence and Testing Directional Predictability between Time Series

with Heejoon Han, Oliver Linton and Yoon-Jae Whang

Journal of Econometrics, July 2016, 193(1), pp. 251-270.

Journal of Econometrics | Working Paper | R-package

Set Identification of the Censored Quantile Regression Model for Short Panels with Fixed Effects

with Tong Li

Journal of Econometrics, October 2015, 188(2), pp. 363–377.

Journal of Econometrics | Working Paper

Divorce Law Reforms and Divorce Rates in the U.S.: An Interactive Fixed Effects Approach

with Dukpa Kim

Journal of Applied Econometrics, March 2014, 29(2), pp. 231-245.

Journal of Applied Econometrics | Working Paper

Estimating Structural Changes in Regression Quantiles

with Zhongjun Qu

Journal of Econometrics, June 2011, 162(2), pp. 248-267.

Journal of Econometrics | Working Paper | R-code

Juvenile Crime and Punishment: Evidence from Japan

Applied Economics, 2009, 41(24), pp. 3103-3115.

Applied Economics

Conference Proceedings

Estimating Distributional Treatment Effects in Randomized Experiments: Machine Learning for Variance Reduction

with Undral Byambadalai, Shota Yasui

International Conference on Machine Learning (ICML) 2024, July 2024

ICML | Working Paper | R-package

Safe Collaborative Filtering

with Riku Togashi, Naoto Ohsaka, Tetsuro Morimura

International Conference on Learning Representations (ICLR) 2024, May 2024

ICLR | Working Paper

Working Papers

Regression Adjustment for Estimating Distributional Treatment Effects in Randomized Controlled Trials

with Shota Yasui, Yuta Hayakawa, Undral Byambadalai, July 2024

Working Paper

Inflation Target at Risk: A Time-Varying Parameter Distributional Regression

with Yunyun Wang and Dan Zhu, Mar 2024

Working Paper

Distributional Vector Autoregression: Eliciting Macro and Financial Dependence

with Yunyun Wang and Dan Zhu, Feb 2023

Working Paper

Semiparametric Single-Index Estimation for Average Treatment Effects

with Difang Huang and Jiti Gao, June 2022

Working Paper

Research Grants

Grant-in-Aid for Scientific Research (C) (24K04821), 2024-2027

Grant-in-Aid for Research Activity Start-up (23K18807), 2023-2024

Australian Research Council (ARC) Discovery Projects (with Pierre Perron and Zhongjun Qu), 2021-2024

Australian Research Council (ARC) Discovery Projects (with Tong Li), 2019-2022

Academic Research Fund (Tier 1), Ministry of Education, Singapore, 2016-2019

Academic Research Fund (Tier 1), Ministry of Education, Singapore, 2013-2016