He has published on a wide variety of topics in the fields of labor economics and the economics of higher education, including: earnings inequality, expenditures in higher education, the gender pay gap, the economic returns to college major, and student loan debt. His research has appeared in scholarly journals such as Labour Economics, Industrial Relations, the Journal of Policy Analysis and Management, and the Economics of Education Review, as well as popular press outlets such as the Chronicle of Higher Education and Fivethirtyeight. He has testified before the U.S. Senate Committee on Health, Education, Labor, and Pensions on the topic of student loan policy and higher education finance.