An Experimental Study of Bidding Behavior in Subcontract Auctions

It is commonly observed in practices that prime contractors solicit subcontract bids, prior to submitting their bids in procurement auctions: the auctioneers in subcontract auctions will become bidders in a procurement auction. This point is remarkably different from the standard theory of procurement auction. We presented a simple model of such subcontract auctions and conducted a laboratory experiment to examine the bidding behavior derived theoretically. We observed that in the subcontract auction, (1) subjects bid following the equilibrium bidding function derived theoretically, (2) the revenue equivalence between first-price and second-price mechanisms breaks down, and (3) the first-price mechanism more likely achieves ex post efficient allocations than the second-price mechanism.