It has been argued that collusion among the members of an organization or a vertical structure creates efficiency losses and, hence, should be prevented. This paper shows that whenever collusion takes the form of co-insurance agreements, here called "friendships," among the members of a vertical...

It has been argued that collusion among the members of an organization may lead to inefficiencies and hence should be prevented in equilibrium. This paper shows that whenever the parties to an organization can renegotiate their incentive scheme after collusion, these inefficiencies can be...

It has been argued that collusion among the members of an organization or a vertical structure creates efficiency losses, and hence should be prevented. This paper shows that whenever collusion takes the form of co-insurance agreements, here called `friendships', among the members of a vertical...