Public services are often provided by lower level agencies that are funded
by higher level government. Since markets for such services do not exist, n
ormal pressures to minimize costs do not operate; indeed, usually these cos
ts are unobservable. We study a principal-agent model which emphasizes the
distinction between the financing and provision of public services. Two bro
ad situations are analyzed: (i) the agencies are induced to reveal true cos
ts; and (ii) in addition, to minimize costs, agencies must be induced to ex
ert effort. The characteristics of the optimal funding contract and the mar
ginal cost of public funds are derived in each case.