Combinatorial Clock Auctions: Price Direction and Performance.

This paper addresses three concerns with ascending price Combinatorial Clock Auctions (CCAs); price guidance toward efficiency relevant packages, computational burden, and susceptibility to collusive bidding. We propose a descending price Combinatorial Clock Auction (DCCA) with a newly devised pricing strategy to alleviate all of these concerns. Mimicking bidding behavior of human subjects found in previous laboratory experiments, agent-based simulations of DCCA show improvements in efficiency resulting from better price guidance and a reduction in computational burden when compared to a CCA. In addition, we summarize evidence from previous literature that highlights the collusion resistance of descending price institutions.