Using laboratory experiments, we compare the stability of bidding rings in the English auction and the first …-price sealed-bid auction in a heterogeneous-value setting. In both a re-matching condition and a fixed-matching condition, we … observe that biddings rings are more stable in the English auction than in the first-price sealed-bid auction. In both …

a procurement auction model where bidders can form bidding rings, and derive the bidding and collusive behavior under no …

efficiency of both the Generalized Second Price auction (GSP, used by Google and Microsoft-Bing and Yahoo!) and the of VCG … the GSP auction both in terms of revenues and efficiency …

-price auction. It does so by starting with the framework of von der Fehr and Harbord (1992, 1993), who solved for an electricity …

ensuing auction, leading to loss of efficiency and eliminating the revenue dominance typically observed in first …