Cooperation in Partnerships: The Role of Breakups and Reputation

Abstract

We investigate experimentally if endogenous partnership formation can improve efficiency in social dilemma situations. Subjects play multiple two-player public goods games, where they can break up with their current partner after every fourth game. Subjects without a partner provide rankings of the available other singles regarding their preferred subject to be matched with. A stable marriage mechanism determines the new matches. We vary the information subjects have when they express their preferences for their future matches and also if staying in a partnership leads to a cost or a bonus. We find that endogenous group formation can increase efficiency. Both the provision of contribution history at the time of re-matching and bonuses for staying in a partnership have positive effects. At least one of the two positive factors has to be present for an efficiency improvement. The presence of both leads to the best results.Social Dilemma, Endogenous Group Formation, Public Goods