1. The End of Democracy? Curtailing Political and Civil Rights in Ethiopia.;Review of African Political Economy,2009
2. Discomfiture of Democracy? The 2005 Election Crisis in Ethiopia and Its Aftermath.;African Affairs,2006
3. Achen, Christopher H. 2000. “Why Lagged Dependent Variables Can Suppress the Explanatory Power of Other Independent Variables.” Paper Presented at the Annual Meeting of the Political Methodology Section of the American Political Science Association, Los Angeles, July 20–22.
4. Who Gives Foreign Aid to Whom and Why?;Journal of Economic Growth,2000
5. Gender as a Factor in the Attribution of Leadership Traits.;Political Research Quarterly,1993