| Abstract: | This article examines how the power of majority‐party leaders to set the legislative voting calendar influences policy change in American state legislatures. By generating an opportunity for party leaders to exercise gatekeeping or negative agenda control, such rules introduce an additional partisan veto player into a system of governance. This addition typically increases the size of the core or gridlock interval, which drives policy change downward. Using both traditional data on bill passage counts and new data on Affordable Care Act compliance, I find strong support for these claims. More specifically, when I calculate core sizes that are sensitive to agenda rules, I find that agenda‐control‐adjusted core size is negatively correlated with policy change, as expected. Moreover, even when I match states on their overall preference dispersion or polarization, the ability of party leaders to exercise negative agenda control is strongly negatively associated with policy change. |
