Dynamic yardstick mechanisms

This paper shows that the inability of principals to commit to long-term contracts is irrelevant when dealing with several agents whose private information is correlated. This sharply contrasts with the dynamics of contracting without such correlation. The paper also explores what limitations on yardstick mechanisms can justify the use of long-term contracts. We found that the inability of a principal to commit not to renegotiate long-term contracts is without consequence even if there is a bound on transfers that an agent can be asked to pay. In contrast, short-term contracting fails to implement the commitment solution with constraints on transfers. Second, absent current yardstick, the possibility of using correlated mechanisms in the future allows the principal to implement the first-best with a renegotiation-proof long-term contract whereas this cannot be achieved with short-term contracting.