In this paper we address the question of collusion in mechanisms under asymmetric information. We develop a methodology to analyze collusion as an informed principal problem. First, if collusion occurs after the agents accept or reject the principal's offer; the dominant-strategy implementation...

We propose a theory explaining the shape of contracts between local governments and the contractors they hire to run public facilities on their behalf. Governments are privately informed over the quality of the facility and risk-averse while risk-neutral contractors are subject to a moral hazard...