Electoral influences on legislative behavior in mixed-member systems: Evidence from Ukraine's Verkhovna Rada

This article addresses how mixed-member systems that combine proportional representation (PR) and single-member districts (SMD) into a single election can influence legislators' voting behavior. Scholars have generally extended standard expectations of behavior to mixed-member systems by assuming that legislators occupying PR seats in mixed-member parliaments should be more cohesive-than those occupying SMD seats. I argue that controlling for seat type alone does not take into account the interaction between PR and SMD in mixed-member systems. Using voting data from Ukraine's Verkhovna Rada, I show that controlling for dual candidacy and the "safety" of the deputy's district or list position increases our understanding of the factors motivating legislative cohesion.