Replication Data for: A Model of Party Effects on Legislative Behavior Based on Roll-Call Data

Scholars analyze roll call votes to test theories about party effects on legislative behavior, but estimating and disentangling party effects from legislators’ ideology is fairly difficult. To tackle this problem, we relax the widely adopted assumption of constant party pressure across votes and collect correlates of “party whipping” to build a measure of party- and vote-specific pressure on legislators. With this measure in hand, we then develop a model to control for ideological preferences and flexibly account for how party pressure may directly or indirectly produce party effects on voting decisions of rank-and file members (including whether they register a vote or not) based on vote and member characteristics. To showcase our approach, we analyze legislative voting in the national legislatures of Brazil and examine hypotheses about how political institutions mediate the effects of party pressure on different legislators and bills.