The Conditional Effect of Electoral Systems and Intraparty Candidate Selection Processes on Parties' Behavior

How do electoral systems and intraparty candidate selection procedures affect party unity? In this article, I distinguish theoretically and empirically between electoral systems and candidate selections and argue that the influence of selection processes on parties' behavior is conditional on electoral system (and vice versa). Measuring parties' unity using Rice and weighted Rice scores, and applying hierarchical models to a new data set of 249 parties in 24 countries, I find support for the claim that the influence of selection processes on behavior is greater under electoral systems that encourage personal vote‐seeking incentives than under electoral systems that encourage party centeredness.