Background materials and replication data for “Cross-Cutting Cleavages and Ethnic Voting: An Experimental Study of Cousinage in Mali,” 2010, American Political Science Review 104 (1): 1-19 (with Lauren Harrison). (The article is here).

Simulations discussed in “Model Specification in Instrumental-Variables Regression,” 2008, Political Analysis 16 (3): 290-302. (The article is here and here).

Replication data for “Conditioning the Effects of Aid: Cold War Politics, Donor Credibility, and Democracy in Africa,” 2004, International Organization, 58 (2), as a text file; you can find a .csv file here. (The article is here).