1. Democracy and growth;Barro;Journal of Economic Growth,1996
2. How Much Should We Trust Differences-in-Differences Estimates?;Bertrand,2001
3. Intellectual property rights and North–South trade;Chin,1990
4. Do patent rights regimes matter?;Co;Review of International Economics,2004
5. Protecting their Intellectual Assets: Appropriability Conditions and Why U.S. Manufacturing Firms Patent (or Not);Cohen,2000