Riordan and Sappington (JET, 1988) show that in an agency relationship in which the agent's type is correlated with a public ex post signal, the principal may attain first best (full surplus extraction and efficient output levels) if the agent is faced with a lottery such that each type is...

Riordan and Sappington (JET, 1988) show that in an agency relationship in which the agent's type is correlated with a public ex post signal, the principal may attain first best (full surplus extraction and efficient output levels) if the agent is faced with a lottery such that each type is...

We model an agency relationship in which the agent's cost is non-monotonic with respect to type and the type is correlated with a public ex-post signal. The principal can use lotteries to exploit the type-signal correlation within the limit of the agent's liability. We establish conditions for...