Employing a theoretical framework derived from the policy innovation and diffusion literature, this research examines how variations over time and across state sociopolitical systems influence states' adoption of accountability policies in higher education. Specifically, factors influencing the adoption of three kinds of performance-accountability policies for public higher education in the period 1979-2002 were investigated. Findings from the event history analysis supported the authors' original hypotheses only in part; the primary drivers of policy adoption were legislative party strength and higher-education governance arrangements, but the direction of these influences varied across the policies studied.