On Measuring Legislative Agenda-Setting Power

We propose a typology for measuring agenda-setting success and failure in a legislative context. Our typology goes beyond the most commonly used measure ("rolls") and includes the full range of agenda-setting outcomes—rolls (opposing a proposal that subsequently passes), as well as "blocks" (opposing a proposal that is subsequently defeated), "successes" (supporting a proposal that subsequently passes), and "disappointments" (supporting a proposal that is subsequently defeated)—and thus takes into account instances of both positive and negative agenda power. We discuss these measures, and the theoretical questions surrounding them, with the hope of providing some guidance to scholars of the U.S. House, as well as those analyzing agenda power in other legislatures. As a first step in this direction, we explore variation in agenda-setting measures in 85 American state legislative chambers, the Mexican Chamber of Deputies, and the Canadian House of Commons.