Before revision: 463x463px|Democracies and dictatorships in 2008 463x463px|Democracies and dictatorships in 1988 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 first proposed by Adam Przeworski et al.
After revision: 463x463px|Democracies and dictatorships in 2008 463x463px|Democracies and dictatorships in 1988 P-Dictatorship (pD ), index of democracy and dictatorship or simply the DD index or the DD datasets was the binary measure of democracy and dictatorship first proposed by Adam Przeworski et al.