Sources of the Incumbency (Dis)Advantage

An emerging literature finds that legislators frequently suffer a negative incumbency advantage in developing countries but disagrees as to the sources of this anti-incumbent bias. We contribute to this literature by examining the case of Brazil, where the extant literature predicts a large incumbency disadvantage. Building a new methodology for OLPR which leverages both inter- and intraparty thresholds, we find, contrary to expectations, a large ‘positive’ incumbency advantage. We further exploit within-country variation and show that this advantage appears to be largest in the least developed areas. Our results suggest that previous work may be confounding country-specific factors with development levels.

Electoral systems; electoral strategies; incumbency advantage; regression discontinuity Design; Brazil