■ Working papers
1. “WORSE THAN THE PROBLEM ITSELF”? The Health and Economic Costs and Benefits of COVID-19 Policy Responses (with Yanli Lin and Bruce Weinberg), Submitted- current version 08/07/2025
2. Dynamic Spatial Interaction Models for a Resource Allocator’s Decisions and Local Agents’ Multiple Activities, [WP - arXiv] [Local copy] [Appendix] Submitted - current version 7/1/2025 (Previous title was "Dynamic spatial interaction models for a leader's resource allocation and followers' multiple activities")
■ Accepted/Published articles
1. Maximum likelihood estimation of a spatial autoregressive model for origin-destination flow variables (with Lung-fei Lee),
Journal of Econometrics, Vol. 242, May 2024, 105790, [link], [WP], [Appendix]
2. Estimation of Spatial Autoregressive Models for Origin-Destination Flows: A partial likelihood approach (with Yanli Lin and Lung-fei Lee),
Economics Letters, Vol. 229, August 2023, 111202 [link], [WP], [Appendix], [Code]
3. Spatial dynamic game models for coevolution of intertemporal economic decision-making and spatial networks (with Lung-fei Lee),
Journal of Economic Dynamics & Control, Vol. 129, 104186, August 2021 [link], [WP], [Appendix], [Code]
4. Differencing versus non-differencing in factor-based forecasting (with In Choi),
Journal of Applied Econometrics, Vol. 35, Issue 6, 728-750, September/October 2020 [link] [Data Archive (at JAE)], [WP], [Appendix]
5. Spatial dynamic models with intertemporal optimization: specification and estimation (with Lung-fei Lee),
Journal of Econometrics, Vol. 218, Issue 1, 82-104, September 2020 [link], [WP], [Appendix], [Code, Readme] presented at the AEA/ASSA annual meeting, 2019 [link],
6. Model selection for factor analysis: some new criteria and performance comparison (with In Choi),
Econometric Reviews, Vol. 38, NO. 6, 577– 596, June 2019 [link], [Supplement]
Code for this paper can be found here: [Panel Data Econometrics] written by Prof. Sul
■ Research Awards / Grants
2021: NIH Awards (NATIONAL INSTITUTE ON AGING) - The Health and Economic Impacts of COVID-19 and Policy Responses [Link]
2018: G.S Maddala prize in econometrics [letter]