Kewei (Benedict) Xu

PhD student of Economics
Northeastern University

Research Assitant
School of Education And Social Policy, Northwestern University (SESP)

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Northwestern University
School of Education and Social Policy
Walter Annenberg Hall, 2120 Campus Drive
Evanston, Illinois 60208

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Working Papers

Clearing the Smoke: Early-Life Exposure to Cigarette Taxes and Later-Life Old-Age Disability and Mortality
with Dr. Hoa Vu, Prof. Towhid Iqram Mahmood and Prof. Hamid Noghanibehambari
Revision requested, Journal of Economics of Aging

This study examines the long-term impacts of early-life exposure to state-level adoption of cigarette taxes on disability and mortality outcomes in old age. Using data from the 1980-2000 decennial censuses and applying a two-way fixed effects model, we find that exposure to cigarette taxes during early life significantly reduces the likelihood of later-life cognitive and work-related disabilities. The effects are particularly pronounced among individuals over the age of 65, implying the latent influence of early life exposure to the policy change. Further analyses suggest improvements in educational attainment and socioeconomic status as potential pathways. We also observed modest but significant increases in longevity. These findings highlight the potential of cigarette tax policies to reduce disability outcomes and their associated burden on healthcare system in the long run.



Works in Progress

Local Leaders’ Behavior and Economic Performance
accepted by PREDOC.org Research Conference

This study will undertake an empirical investigation into the behaviors of provincial mayors and their impacts on the economy across China. Employing a novel natural language processing technique known as BERTopic, my research team aims to identify mismatches within the political framework


Class Composition, Peer Effects and Student Achievement

Coming Soon.



Research Experiences

The 24th Annual International Industrial Organization Conference 2026, Northeastern University


PREDOC.org Research Conference 2025, World Bank Group


Decentralized Autonomous Organization Project, Hong Kong Polytechnic University, Research Assistant of Prof. Wenzhi Ding


Pre-Admissions Welcome Event 2025 for Ph.D. program in Applied Economics, Northeastern University


Applied Social Sciences Alliance (ASSA) Annual Conference 2025, Hilton San Francisco Union Square


Empirical Research on Standardization Conference 2024, Pritzker School of Law, Northwestern University


Recruitment Camp for Prospective PhD Students 2024, The Chinese University of Hong Kong


A Longitudinal Field Experiment on Work Team Creativity in an Extreme Context, Peking University, Research Assistant


ESG Fund Analysis Project, The University of Sydney, Research Assistant



Referee

PhD Advisor
Prof. Nishith Prakash, Prof. Jun Ma


Master Referee
Dr. Hoa Vu, Prof. Scott Ogawa, Prof. David Uttal, Prof. John Olson, Dr. Ruhan Circi


Undergraduate Referee
Prof. Cong Wang, Dr. Steven Sommer, Dr. Chuan Yu


Exchange Referee
Prof. Lukas Hensel