Democracy-Dictatorship Index

Democracy-Dictatorship (DD), index of democracy and dictatorship or simply the DD index or the DD datasets was the binary measure of democracy and dictatorship whose publication stopped in 2008. Originally proposed by Adam Przeworski, and further developed and maintained by Cheibub, Gandhi, and Vreeland.

Based on the regime binary classification idea proposed by Alvarez in 1996, and the Democracy and Development (or DD measure, ACLP dataset) proposed by Przeworski, Cheibub, Gandhi, and Vreeland developed a six-fold regime classification scheme, resulting what the authors called as the DD datasets.: 68 

The DD dataset covers the annual data points of 199 countries from 1946 (or date of independence) to 2008.: 68  The figures at the left show the results in 1988 and 2008.

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