Professor of Political Science at The University of Pennsylvania
Articles in Peer Reviewed Journals
“Stopping the Violence, Blocking the Peace: Dilemmas of Foreign-Imposed Nation-Building after Ethnic War” (with Kevin Russell). International Organization (forthcoming in 2021). https://www.doi.org/10.1017/S0020818321000266
“Temperature and Outgroup Prejudice” (with Donghyun Danny Choi and Mathias Poertner). Political Science Research and Methods (forthcoming in 2021). https://doi.org/10.1017/psrm.2021.17
“Political Exclusion, Lost Autonomy, and Non-Violent Separatism” (with Micha Germann). International Organization 75 (1): 178-203 (2021). http://dx.doi.org/10.1017/S0020818320000557
“Linguistic Assimilation Does Not Reduce Discrimination Against Immigrants: Evidence from a Field Experiment in Germany” (with Donghyun Danny Choi and Mathias Poertner). Journal of Experimental Political Science (2020). https://doi.org/10.1017/XPS.2020.20.
“Forecasting Civil Wars: Theory and Structure in an Age of “Big Data” and Machine Learning” (with Robert Blair). Journal of Conflict Resolution 64 (10): 1885-1915 (2020). https://doi.org/10.1177/0022002720918923.
“External Intervention, Polarization, and Civil War” (with Stergios Skaperdas and William Wohlforth). Comparative Political Studies 53 (14): 2155-2182 (2020). https://doi.org/10.1177/0010414020912279
“Parochialism, Social Norms, and Discrimination toward Immigrants” (with Donghyun Danny Choi and Matthias Poertner). Proceedings of the National Academy of Science 116 (33): 16274-16279 (2019). https://doi.org/10.1073/pnas.1820146116
“Violence Exposure and Ethnic Identification: Evidence from Kashmir” (with Gautam Nair). International Organization 73 (2): 329-363 (2019). https://doi.org/10.1017/S0020818318000498
“Sovereignty Rupture as a Central Concept in Quantitative Measures of Civil War” (with Jonah Schulhofer-Wohl). Journal of Conflict Resolution 63 (6): 1542-1578 (2019). https://doi.org/10.1177/0022002719842657
“What Is the Mechanism Underlying Audience Costs: Reputation, Belligerence, and Leader Competence” (with William Nomikos). Journal of Peace Research 56 (4): 575-588 (2019). https://doi.org/10.1177/0022343319839456
“SDM: A New Dataset on Self-Determination Movements with an application to the Reputational Theory of Civil War” (with Micha Germann and Andreas Schädel). Journal of Conflict Resolution 62 (3): 656–86 (2018). https://doi.org/10.1177/0022002717735364
“Nation-Building through War” (with Stergios Skaperdas and William Wohlforth). American Political Science Review 109 (2): 279-296 (2015). https://doi.org/10.1017/S0003055415000088
“Explaining Regional Autonomy Differences in Decentralized Countries” (with Branko Milanovic). Comparative Political Studies 47: 1830-1855 (2014). https://doi.org/10.1177/0010414013520524
“Social Identification and Ethnic Conflict” (with Moses Shayo). American Political Science Review 107 (2): 294-325 (2013). https://doi.org/10.1017/S0003055413000038
“Parochialism as a Central Challenge in Counterinsurgency” (with Jonah Schulhofer-Wohl and Moses Shayo). Science 336: 805-808 (May 18, 2012). https://doi.org/10.1126/science.1222304
“A Comment on Diagnostic Tools for Counterfactual Inference” (with Alexander Michaelides). Political Analysis 17 (1): 89-106 (2009). https://doi.org/10.1093/pan/mpm032
“Short-Term and Long-Term Effects of United Nations Peace Operations.” World Bank Economic Review 22: 9-32 (2008). https://doi.org/10.1093/wber/lhm022
“Rebel-Military Integration and Civil War Termination” (with Katherine Glassmyer). Journal of Peace Research 45 (3): 365-384 (2008). https://doi.org/10.1177/0022343308088816
“No Easy Choices: Estimating the Effects of United Nations Peacekeeping” (with Michael Doyle). International Studies Quarterly 51 (1): 217-226 (2007).https://doi.org/10.1111/j.1468-2478.2007.00447.x
“Sensitivity Analysis of Empirical Results on Civil War Onset” (with Håvard Hegre). Journal of Conflict Resolution 50 (4): 508-535 (2006). https://doi.org/10.1177/0022002706289303
“What Is A Civil War? Conceptual and Empirical Complexities of an Operational Definition.” Journal of Conflict Resolution 48 (6): 814-858 (2004). https://doi.org/10.1177/0022002704269355
“How Much War Will We See? Explaining the Prevalence of Civil War” (with Ibrahim Elbadawi). Journal of Conflict Resolution 46 (3): 307-334 (2002). https://doi.org/10.1177/0022002702046003001
Journal of Conflict Resolution 46 (1): 1-170. February 2002 special issue on civil wars. Co-editor with Paul Collier.
“A Review of Recent Advances and Future Directions in the Literature on Civil War.” Defense and Peace Economics 13 (2): 215-243 (2002). https://doi.org/10.1080/10242690210976
“Do Ethnic and Non-Ethnic Civil Wars Have the Same Causes? A Theoretical and Empirical Inquiry (Part 1).” Journal of Conflict Resolution 45 (3): 259-82 (2001). https://doi.org/10.1177/0022002701045003001
“International Peacebuilding: A Theoretical and Quantitative Analysis” (with Michael Doyle). American Political Science Review 94 (4): 779-801 (2000). https://doi.org/10.2307/2586208
Reprinted in Todd Sandler and Keith Hartley, eds., The Economics of Conflict, Aldershot, UK: Edward Elgar, 2004.
“Why Are There So Many Civil Wars in Africa? Understanding and Preventing Violent Conflict” (with Ibrahim Elbadawi). Journal of African Economies 9 (3): 244-69 (2000). https://doi.org/10.1093/jae/9.3.244
“Policies for Building Post-Conflict Peace” (with Betty Bigombe and Paul Collier). Journal of African Economies 9 (3): 322-47 (2000). DOI: 1093/jae/9.3.323
“Partition as a Solution to Ethnic War: An Empirical Critique of the Theoretical Literature.” World Politics 52: 437-83 (2000). https://doi.org/10.1017/S0043887100020074
Reprinted in Roy Licklider and Mia Bloom, eds., Living Together After Ethnic Killing, Routledge Press, 2006).
“The UN Operation in Cyprus: A New Look at the Peacekeeping-Peacemaking Relationship.” International Peacekeeping 6 (1): 79-108 (1999). https://doi.org/10.1080/13533319908413758
