You just made it: Individual incumbency advantage under Proportional Representation

Using close election outcomes, we identify a personal effect of incumbency on the probability of seeking election, and seeking and winning office in subsequent elections for elected officials in an Open List Proportional System. In many cases Danish local elections creates an as-if random distribution of candidates that are elected or not, which is an ideal setting for a Regression Discontinuity design. The incumbency advantage has been studied to a great extent, though primarily in pluralistic electoral systems, while more recent studies have extended the scope to Proportional Representation systems. This study adds to this budding literature by showing an advantage in a new context and focusing on candidate level electoral returns under conditions where candidates are arguably least likely to benefit from incumbency.