May's Law of Curvilinear Disparity Revisited

Explaining ideological conflict has always been a classic theme of studies of party organizations. The aim of this paper is to re-examine May's law, based on rational choice theory, which suggests that due to differential incentives sub-leaders are likely to prove the most extreme stratum in party organizations, while non-leaders are the most moderate, and top leaders are located equidistant between these groups. The study, based on large-scale surveys of politicians, local constituency officers, party members and voters in the 1992 British general election, throws considerable doubt on this proposition.