Political Science Data, Methods, and Replication Resources

Extensive collection of datasets for researchers. .

A compilation of many state-to-state relational variables, including measures of shared borders, travel and trade between states, and demographic characteristics of state populations..

Public opinion surveys from U.S. and around the world..

contains information on de jure institutional provisions, electoral procedures, and electoral events for 170 countries in the period 1960-2012.

An independent, multidisciplinary organization working to create knowledge, build awareness, and stimulate action to advance the rule of law worldwide..