Why has voter turnout declined in democracies all over the world? This article draws on findings from microlevel studies and theorizes two explanations: generational change and a rise in the number of elective institutions. The empirical section tests these hypotheses along with other explanations proposed in the literature—shifts in party/candidate competition, voting-age reform, weakening group mobilization, income inequality, and economic globalization. The authors conduct two analyses. The first analysis employs an original data set covering all post-1945 democratic national elections. The second studies individual-level data from the Comparative Study of Electoral Systems and British, Canadian, and US national election studies. The results strongly support the generational change and elective institutions hypotheses, which account for most of the decline in voter turnout. These findings have important implications for a better understanding of the current transformations of representative democracy and the challenges it faces.
