Democracy indices are quantitative and comparative assessments of the state of democracy[1] for different countries according to various definitions of democracy.[2]
The democracy indices differ in whether they are categorical, such as classifying countries into democracies, hybrid regimes, and autocracies,[3][4] or continuous values.[5] The qualitative nature of democracy indices enables data analytical approaches for studying causal mechanisms of regime transformation processes.
Democracy indices differ in scope and weighting of various aspects of democracy, including the breadth of core democratic institutions, competitiveness and inclusiveness of polyarchy, freedom of expression, various aspects of governance, democratic norm transgressions, co-option of opposition, electoral system manipulation, electoral fraud, and popular support of anti-democratic alternatives.[6][7][8]