What Can We Learn about the Effects of Democracy Using Cross-National Data?

More than 1,100 studies have been published that examine the effects of democracy using cross-national data since 2000. This article examines whether these analyses have sufficient statistical power to detect an effect of democracy. Using Monte Carlo simulation and examining consensus effects previously reported in the literature, the article finds that studies are only powered to detect very strong effects of democracy when examining countries over time. This raises questions about what sort of relationships can be analyzed using cross-national data.