Measuring Liberal Democratic Performance: an Empirical and Conceptual Critique

Liberal democratic performance is understood as the delivery of liberal democratic values, and not as regime longevity or government efficacy. Measuring it is a matter of how far liberal democratic governments achieve in practice the values they endorse in principle.
It is recognized that the performance of liberal democratic governments varies widely. But extant attempts to measure this variation suffer problems of reliability and validity, and the object of measurement is often unclear.
By defining the range of liberal democratic values we demonstrate that performance is multidimensional and that trade-offs across different values can create distinct performance profiles. The narrow gauge of the extant meaures – usually of just one or two values – is often disguised by single scales that masquerade as summary performance indicators.