A deterrent to diversity: The conditional effect of electoral rules on the nomination of women candidates

Previous literature regarding the effects of electoral systems on candidate selection has implied a false dichotomy regarding proportional representation (PR) versus single member districts (SMD). This paper unpacks the category of proportional representation, and finds significant differences in the behavior of selectorates depending on their configuration of PR. Using both a natural experiment as well as an original data set comprised of 1095 party lists, I find that the type of proportional representation – i.e., whether or not the voters are allowed to pick a particular candidate from the party list – can have a significant effect on the number of women candidates selected to run for office. Further, I find that the strength of this effect depends on cultural gender norms; if a substantial segment of society believes that women are best in traditional roles, not as leaders, there is a significant, negative effect of the decisive intraparty preference vote on the nomination of women candidates.