Polity data series

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Number of nations 1800-2003 scoring 8 or higher on Polity IV scale, a measure of democracy.
Number of nations 1800-2003 scoring 8 or higher on Polity IV scale, a measure of democracy.

The Polity data series is a widely used data series in political science research.[1]The latest version, Polity IV contains coded annual information on regime and authority characteristics for all independent states (with greater than 500,000 total population) in the global state system and covers the years 1800-2004.

  1. ^ Casper, Gretchen, and Claudiu Tufis. 2003. “Correlation Versus Interchangeability: the Limited Robustness of Empirical Finding on Democracy Using Highly Correlated Data Sets.” Political Analysis 11: 196-203.

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