An agency model is presented in which outsourcing strictly dominates in-hou
se production. We argue that firms outsource in order to improve managerial
incentives. Conditions are established under which the firm is strictly be
tter off with outsourcing. The benefit of outsourcing, however, is constrai
ned by the trade-off between the incremental coordination costs of outsourc
ing and the improved incentive structure. The optimal contract is also show
n to be a function of whether or not the firm is publicly held. For a publi
cly held firm, the contract is constant. For a privately held supplier, the
contract is likely to be of a cost-sharing type. These findings offer prel
iminary incentive explanations for commonly observed outsourcing practices.