I am a political economist at Columbia SIPA. My research is in political economics, public economics, and industrial organization, with applications to lobbying, special interests, regulation, distributive politics, redistricting, representation, financial regulation, and populism.
I teach core graduate economics courses in the MIA and MPA programs and develop open-source pedagogical tools for economics instruction, including EconPractice and EconPlayground.
Office Hours - Spring 2026
By appointment
tgroll (at) columbia (dot) edu
tgroll.econ (at) gmail (dot) com
School of International and Public Affairs
Columbia University
420 West 118th Street
Suite 1323, MC 3323
New York, NY 10027
Office: 1308 International Affairs
Phone: +1-212-851-0194