Replication Data for: Talking Shops: The Effects of Caucus Discussion on Policy Coalitions

Group discussion of legislation is a defining feature of parliaments and legislatures. However, there is little evidence that these conferences influence legislators' policy positions or the disposition of legislation. This paper examines how, and to what extent, group discussion influences policy coalitions. It reports results from two field experiments in which state legislators spoke about randomly selected bills in a bipartisan caucus. Chosen bills received twice as much support from caucus members as unselected bills. Estimated effects are similar in magnitude within and across party lines. Discussion did not appear to affect bill-level outcomes such as bill content or bill passage, but power limitations make studying such policy-level outcomes infeasible. Qualitative data from the experiments suggest that reputation and reciprocity are key mechanisms underlying influence, but that partisan voters and media are obstacles to bipartisanship in a contemporary American legislature.