Deinstitutionalization of the party system in Mexico: volatility, fragmentation and effective number of parties

Abstract

This paper analyzes the process of deinstitutionalization of the party system in Mexico observable from the constant disaffection of citizenship with respect to the three main political parties in Mexico, which built the process of democratization of the previous hegemonic type of authoritarian regime in the current Democratized regime with deep traces of disenchantment. Political variables and indicators such as volatility, electoral fragmentation and the effective number of parties are used and attempts are made to explain the causes that have caused the fall in levels of electoral support to the three main parties in favor of other political options.