A model of procurement contracting is developed and tested in laborato
ry experiments. Market performance results are presented for both fixe
d-price and cost-sharing contracts. Contracts are awarded with first-p
rice sealed-bid or second-price sealed-bid auctions. The environment c
ontains post-auction cost uncertainty and opportunity for unmonitored
effort in contract cost reduction. Cost-sharing contracts are found to
reduce procurement expense but also to be inefficient because of thei
r induced moral hazard waste and cost overruns. (C) 1996 Academic Pres
s, Inc.