∗ Electoral Competition and Factional Sabotage y Giovanna M. Invernizzi December 6, 2020 Abstract Intra-party sabotage is a widespread phenomenon that undermines the strength of political parties. What brings opposing factions to engage in sabotage rather than enhancing the party image, and what strategies can parties adopt to contain it? This paper presents a model of elections in which intra-party factions can devote resources to campaign for the party or to undermine each other and obtain more power. The party redistributes electoral spoils among factions to motivate their investment in campaigning activities. The model shows that sabotage increases when the stakes of the election are low | e.g., in consensus democracies that grant power to the losing party | because the incentives to focus on the fight for internal power increase. It also suggests that the optimal party strategy for winning the election in the face of intra-party competition is to reward factions with high powered incentives when campaigning effort can be easily monitored, but treat factions equally otherwise. Keywords: Party Organization, Electoral Competition, Party Factions, Sabotage. ∗ I am grateful to Peter Buisseret, Alessandra Casella, Sean Gailmard, German Gieczewski, John Huber, Matias Iaryczower, Federica Izzo, Korhan Kocak, Nikitas Konstantinidis, Carlo Prato, Manuel Puente, Gregory Sasso, Michael Ting, Stephane Wolton and 2019-20 LSE students enrolled in GV4J6 for their feedback and their suggestions. I would also like to thank audience members at the Princeton Political Economy Workshop, the 2019 MPSA Annual Meeting, the 2019 and 2020 APSA Annual Meeting, and the 2020 Virtual Formal Theory Workshop. yDepartment of Political Science, Columbia University, Email:
[email protected] Electronic copy available at: https://ssrn.com/abstract=3329622 1.