Incumbency, Parties, and Legislatures: Theory and Evidence from India

Abstract

Incumbent legislators in some developing countries are often thought to face an electoral disadvantage relative to challengers. This article traces this effect to high levels of centralization within the political parties and governments of these countries. In political systems dominated by party leaders, legislators face substantial formal and informal constraints on their ability to influence policy, stake positions, and control patronage, which in turn reduce their ability to build up personal votes. This theory is tested on a dataset of Indian national elections since 1977, using a regression discontinuity design to measure the effects of incumbency. Candidates less affected by centralization-those from less-centralized political parties and from parties not affected by restrictions on free parliamentary voting - have a low or non-existent incumbency disadvantage.