A contest is a situation in which individuals expend resources in order to win valuable prize(s). 'Sabotage' is a deliberate, and often costly and illegal, act of damaging a rival's likelihood of winning the contest. It is done by exerting resources to negatively influence the effectiveness of a...

We study competitive behavior in all-pay Tullock (1980) contests with identity-dependent externalities (IDEs) governed by a fixed network. First, we introduce a model of network contest games, in which the prize generates an externality---which may be positive or negative---that impacts each...

Standard theoretical prediction is that rational economic agents participating in rent-seeking contests should engage in socially inefficient behavior by exerting costly efforts. Experimental studies find that the actual efforts of participants are significantly higher than predicted and that...

The present paper analyzes situations in which groups compete for rents. A major result in the literature has been that there are both cases where larger groups have advantages and cases where they have disadvantages. The paper provides two intuitive criteria which for groups with homogenous...

The present paper analyzes the occurrence of the group-size paradox in situations in which groups compete for rents, allowing for degrees of rivalness of the rent among group members. We provide two intuitive criteria which for groups with homogenous valuations of the rent determine whether...

The present paper analyzes situations in which groups compete for rents. A major result in the literature has been that there are both cases where larger groups have advantages and cases where they have disadvantages. The paper provides two intuitive criteria which for groups with homogenous...

The private provision of public goods suffers from two potential types of efficiency failures: non-optimal output levels of the public good (quantity problem) and an inefficient mix of contributors and non-contributors (sorting problem). Embedding the provision game into a contest that rewards...

There is strong evidence that people exploit their bargaining power in competitive markets but not in bilateral bargaining situations. There is also strong evidence that people exploit free-riding opportunities in voluntary cooperation games. Yet, when they are given the opportunity to punish...

This paper presents a formal theory of reciprocity. Reciprocity means that people reward kind actions and punish unkind ones. The theory takes into account that people evaluate the kindness of an action not only by its consequences but also by the intention underlying this action. The theory...

We present experimental evidence for decision settings where public good providers compete for endogenous donations offered by outside donors. Donors receive benefits from public good provision but cannot provide the good themselves. The performance of three competition mechanisms is examined in...