 He is also a member of the American Economic Association, American Political Science Association and the Economic History Association, among others, and he is on the board of directors of the "Journal of Institutional and Theoretical Economics", "Constitutional Political Economy", "Journal of Policy Reform", "Public Choice" and "Business and Politics".His research interests focus on political economy, new institutional economics, regulation, and the application of rational choice theory to legal, legislative, and constitutional institutions.The bibliographic database IDEAS/RePEc ranks him among the top 5% of economists according to different metrics, including average rank score, number of citations, and number of distinct works.