The American National Election Studies (ANES) is a comprehensive longitudinal data collection. The ANES is responsible for providing gold standard data on voting, public opinion, and political participation in American national elections. ANES’s data are valuable for many reasons: they measure multiple variables; they allow complex comparisons across people, place, and time; they consistently and continuously leverage methodological advances; and they support dynamic hypothesis testing. Because ANES data have these attributes, they are used by researchers all over the world to answer questions that are vital to the health of American democracy. Through researchers who use ANES data, the ANES advances the progress of science and provides a vital service to the nation. See full listing.