His research interests include American politics, metropolitan governance, municipal finance, and intergovernmental fiscal relations. Berry is the author of Imperfect Union: Representation and Taxation in Multilevel Governments, winner of the Best Book Award in Urban Politics from the American Political Science Association, and many other scholarly publications. He also reaches a broader audience by sharing his research in the New York Times, the Washington Post, Bloomberg BusinessWeek, the Chicago Tribune, Last Week Tonight with John Oliver, and many other outlets.