Abstract
The achievements reached by group members’ effort, which accompanies the possibility of members’ free-riding, affect the outcomes of competition among groups. In some cases, each achievement has the binary characteristic of “one or nothing.” For example, research groups face the challenge of making a scientific finding or not. The groups compete for a scientific breakthrough by making the related findings in a “step-by-step” manner. One finding could fail because of a mistake caused by a slight lack of effort by one member. Such a characteristic of “one or nothing” motivates group members without any incentive scheme. This study analyzes group contests with group-specific public-good prizes, in which we introduce a step function with the characteristics of “one or nothing” and “step-by-step” as a group impact function. We show the existence of the Nash equilibrium at which no group member free-rides on the others and at which more achievements than those reachable by a single member are reached.
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