Ranking Teams
研究委托人如何对组织内的团队进行排名和奖励，发现存在事后激励相容且高效的团队排名机制的条件：要么有一个成员属于所有团队（监督者条件），要么共享一个成员的团队至少共享两个成员（连通性条件）。
A principal wants to rank and reward teams in an organization. Agents perfectly observe the local ranking of their teams, and strictly prefer being on higher-ranking teams. I show there exists an ex-post incentive compatible and efficient team ranking mechanism if (i) there is an agent who belongs to every team (supervisor condition), or (ii) whenever two teams share an agent in common, they share at least two agents in common (connectivity condition). I identify a class of organizations for which these conditions are both necessary and sufficient. In the special case where the principal wants to rank every group of co-workers in the organization, there exists a team ranking mechanism if and only if the organizational network is a star.