Polity Data : Persistence and Change in Political Systems, 1800-1971

This study contains data for 428 new polities (all polities that developed after a major change in the old polity). Main Topics: Variables Variables include 11 identification variables, 28 variables defining origin and character of polity at its origin and termination, 31 calculated scores for polity characteristics, and 14 generated variables defining characteristics of polities.