Aggregated Threshold Function Dataset (1945-2000)

This dataset contains the variables used to characterise PR and plurality/majority electoral systems employed in worlwide parliamentary elections between 1946 and 2000. Characterizarion is carried out using two values: the minimum proportion of votes necessary to win 1 seat in the parliament and the minimum proportion of votes required to win half of the seats in the lower chamber. This dataset is a modified version of a broader dataset elaborated by Golder (2005) and Przeworski et al (2000). Data is presented by country and election year.