William D. Berry (political scientist)
William Dale Berry is the "Syde P. Deeb Eminent Scholar in Political Science" and "Marian D. Irish Professor of Political Science" at Florida State University. His research analyzes the impact of electoral competition on the policy choices made by state legislators, and the effect of state welfare policy on poverty in the United States. Berry's research on methodology focuses on the development of techniques for estimating econometric models with binary dependent variables, and methods for studying policy diffusion using geographical information systems.