Coping with complexity: Ballot position effects in the Finnish open-list proportional representation system

Many studies show that the order of candidates’ names on the ballot has an effect on voting. Less informed and indifferent voters may simplify the voting process by using the ballot position of candidates as a voting cue. By studying six parliamentary elections in Finland, this study first demonstrates that the relationship between ballot position and preference votes follows a reversed J-shaped curve. Candidates listed early on the ballot win the most preference votes, while candidates listed near the end have an advantage over those listed in the middle. Furthermore, the ballot position effect grows stronger with the complexity of the electoral environment. The ballot position effect increases as the number of candidates on the party list increases, the candidates-to-seats ratio increases and the number of incumbents on the list decreases.