Abrupt and Gradual Realignments: The Case of Costa Rica, 1958–2018

Studies on party system change in Latin America commonly label similar processes as constituting dealignment or realignment. To clarify the boundaries between both concepts, we distinguish between abrupt and gradual realignments. While both imply change, they differ in the number of election cycles involved. Abrupt realignments occur in a single election cycle, while gradual realignments take place in two or more. We apply this conceptualisation to Costa Rica, Latin America’s longest-running democracy, and a country where the party system has decayed without collapsing. To better identify the type of change that has taken place, we use canton-level election data from 1958 to 2018 and public opinion surveys from 1978 to 2018. The evidence contests the notion of electoral dealignment. Instead, we show that the party system experienced an abrupt realignment in the 2002 election and gradual realignment in more recent election cycles.