POLPOP is a transnational project studying political elites from a comparative perspective. The project examines the level of congruence between political elites and citizens in their political behavior and attitudes. Every four years, POLPOP conducts both a citizen survey and an elite survey. Each iteration of the project has a slightly different focus. While POLPOP I focuses on how politicians perceive public opinion, POLPOP II centers on how politicians evaluate public opinion.