Many long-term contracts incorporate a termination clause. This paper
argues that when agents have hidden information, such a clause has a b
eneficial incentive effect-it enables a principal to screen agents' pr
ivate information at a lower cost. In a two-period model, this paper c
haracterizes the optimal long-term contract with a termination clause,
which specifies that the principal will switch agents in the second p
eriod when the first-period cost is high. The analysis delineates how
the optimality of this clause depends on the intertemporal cost correl
ation structure, on the limits to agents' liability, and on the princi
pal's degree of commitment.