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 vary in their scope and the weight assigned to different aspects of democracy. These aspects include the breadth and strength of core democratic institutions, the competitiveness and inclusiveness of polyarchy, freedom of expression, governance quality, adherence to democratic norms, co-option of opposition, and other related factors.electoral system manipulation, electoral fraud, and popular support of anti-democratic alternatives.[6][7][8]