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 … See more

The DD index first classifies the regimes into two types: democracies and dictatorships. For democracies, it categorizes them into three types: parliamentary, semi-presidential and presidentia… See more

Democracies are classified by the rules in which executives can be appointed or removed and can be either presidential, mixed or semi-presidential, or parliamentary. It is important to note that these nam… See more

The DD dataset is limited to 199 countries after 1946, whereas Boix, Miller, & Rosato, 2013 proposed a data set from 1800 to 2007, covering 219 countries. The 2010 version of Polity data series covers 189 countries fr… See more