I am a professor in the Department of Political Science at the University of Iowa. My interests include comparative political behavior, comparative public opinion, and political economy from a cross-national perspective; I am also interested in computational methods for cross-national research. My work has been published in the American Political Science Review, the American Journal of Political Science, the Journal of Politics, the British Journal of Political Science, and other leading disciplinary and interdisciplinary journals.

Much of my research has focused on understanding how—and why—the extent of economic inequality in a country shapes the attitudes and behavior of the people who live there. To provide data for such work and many more topics in the study of income inequality, I created and maintain the Standardized World Income Inequality Database (SWIID), which provides the most-comparable data available on income inequality for broadly cross-national research. I also lead the Dynamic Comparative Public Opinion (DCPO) Lab, which draws on thousands of surveys and advances in Bayesian estimation to provide cross-nationally comparable estimates of trends in public opinion. Please use the links above to find out more about the SWIID, DCPO, my research, the courses I teach, my published software, blogged updates and working notes, and my CV.