Working Papers

[WP7]. Difference-in-Differences Designs: A Practitioner's Guide

with Andrew Baker, Brantly Callaway, Andrew Baker, and Andrew Goodman-Bacon
Revise and Resubmit at the Journal of Economic Literature

[WP6]. Was Javert right to be suspicious? Unpacking treatment effect heterogeneity of alternative sentences on time-to-recidivism in Brazil.

with Santiago Acerenza and Vitor Possebom
This version: Nov 2023. First version: April 2023.
[arXiv] [pdf]

[WP5]. Doubly Robust Estimators with Weak Overlap.

with Yukun Ma, Yuya Sasaki, and Takuya Ura
First version: April 2023.
[arXiv] [pdf]

[WP4]. Difference-in-Differences with Compositional Changes.

with Qi Xu
Revise and Resubmit at the Journal of Econometrics
First version: April 2023.
[arXiv] [pdf] [Appendix]

[WP3]. Selection and Parallel Trends.

with Dalia Ghanem and Kaspar Wüthrich
This version: December 2023. First version: March 2022.
[arXiv] [pdf]

[WP2]. Difference-in-Differences with a Continuous Treatment.

with Brantly Callaway and Andrew Goodman-Bacon
Revise and Resubmit at the American Economic Review
This version: January 2024. First version: July 2021.
[arXiv] [pdf] [Supplementary Appendix]

[WP1]. Program Evaluation with Right-Censored Data

This version: April 2016.
Reject and Resubmit
[Supplementary Appendix] [R package: kmte]


12. Event-Studies with a Continuous Treatment.

with Brantly Callaway and Andrew Goodman-Bacon
AEA Papers and Proceedings, 2024, Forthcoming
[pdf] [Replication files]

11. Efficient Estimation for Staggered Rollout Designs.

with Jonathan Roth
Journal of Political Economy: Microeconomics, vol. 1 (4), p. 669–-709
[arXiv] [pdf] [R (and Stata) package: staggered]

10. When Is Parallel Trends Sensitive to Functional Form?

with Jonathan Roth
Econometrica, vol. 91 (2), p. 737-747, 2023
[arXiv] [pdf]

9. What's Trending in Difference-in-Differences? A Synthesis of the Recent Econometrics Literature.

with Jonathan Roth, Alyssa Bilinski and John Poe
Journal of Econometrics, vol. 235 (2), p. 2218-2244, 2023
[arXiv] [pdf]

8. Covariate Distribution Balance via Propensity Scores.

with Xiaojun Song and Qi Xu.
Journal of Applied Econometrics, vol. 37 (6), p. 1093-1120, 2022
[arXiv] [pdf] [Supplementary Appendix] [R package: IPS]

7. Distribution Regression in Duration Analysis: an Application to Unemployment Spells.

with Miguel A. Delgado and Andrés García-Suaza.
Econometrics Journal, vol. 25 (2), p. 675–698, 2022.
[arXiv] [pdf] [Supplementary Appendix] [Replication files]

6. Difference-in-Differences with Multiple Time Periods.

with Brantly Callaway.
Journal of Econometrics, vol. 225 (2), p. 200-230, 2021.
[arXiv] [pdf] [Supplementary Appendix] [R package: did] [Stata wrapper] [Slides]
Previous versions were circulated as "Difference-in-Differences with Multiple Time Periods and an Application on the Minimum Wage and Employment".

5. The Role of Parallel Trends in Event Study Settings: An Application to Environmental Economics.

with Michelle M. Marcus.
Journal of the Association of Environmental and Resource Economists, vol. 8 (2), p. 235–275, 2021.
[arXiv] [pdf] [Supplementary Appendix] [R package] [Replication files] [Slides]

4. Doubly Robust Difference-in-Differences Estimators.

with Jun Zhao
Journal of Econometrics, vol. 219 (1), p. 101-122, 2020.
[arXiv] [pdf] [Supplementary Appendix] [R package: DRDID] [Replication files] [Slides]

3. Nonparametric Tests for Treatment Effect Heterogeneity with Duration Outcomes.

Journal of Business & Economic Statistics, vol. 39 (3), p. 816-832, 2021.
[SSRN] [arXiv] [Supplementary Appendix] [ R package: kmte]
This is a revised version of my earlier draft, "Nonparametric tests for conditional treatment effects with duration outcomes", November 2014.

2. Specification Tests for the Propensity Score.

with Xiaojun Song.
Journal of Econometrics, vol. 210 (2), p. 379-404, 2019.
[SSRN] [arXiv] [R package: pstest] [Replication files]

1. Testing for Uncorrelated Residuals in Dynamic Count Models with an Application to Corporate Bankruptcy.

Journal of Business & Economic Statistics, vol. 35 (3), p. 349-358, 2017.
[Replication files available upon request]


Comments and Revised Findings for "Procedural justice training reduces police use of force and complaints against officers"

with Jonathan Roth, George Wood, Andrew Papachristos, and Tom Tyler.
[Summary] [Initial Letter] [Reanalysis]