Vote-earning strategies in flexible list systems: Seats at the price of unity

In theory, flexible list systems are a compromise between closed-list and open-list proportional representation. A party's list of candidates can be reordered by voters if the number of votes cast for an individual candidate exceeds some quota. Because these barriers to reordering are rarely overcome, these systems are often characterized as basically closed-list systems. Paradoxically, in many cases, candidates are increasingly earning individual-level preference votes. Using data from Slovakia, we show that incumbents cultivate personal reputations because parties reward preference vote earning candidates with better pre-election list positions in the future. Ironically, the party's vote-earning strategy comes at a price, as incumbents use voting against the party on the chamber floor to generate the reputations that garner preference votes.

► MPs pursue preference votes in flexible list systems despite their limited impact on who gets elected.
► Party leaders reward preference vote earners with better pre-election list positions in the, future.
► MPs earn preferences votes by breaking party unity during roll calls on the chamber floor.
► In sum, party leaders purchase seats at the price of party unity.