Aldrich, J.; Munger, M. C.; Cooper, A.; Rozell, M.; Wilcox, C.; Green, J. (2013). 2000-2004 Presidential Donor Survey. Duke Digital Repository. http://hdl.handle.net/10161/7882
Büthe, T., Bradford, A. (2018). Law and politics of antitrust in open economies - PTA Data: Antitrust/competition provisions in a sample of 182 preferential trade agreements, 1945-2010. Duke Digital Repository. https://doi.org/10.7924/r4h70c24h