Peter M Aronow1, Benjamin T Miller2. 1. Department of Political Science, Yale University, New Haven, CT 06520, USA; Institution for Social and Policy Studies, Yale University, New Haven, CT 06520, USA; Department of Biostatistics, Yale School of Public Health, Yale University, New Haven, CT 06520, USA. Electronic address: peter.aronow@yale.edu. 2. Department of Political Science, Yale University, New Haven, CT 06520, USA.