Parkes, DavidUngar, Lyle H.2010-05-182002Parkes, David C., and Lyle H. Ungar. 2002. An ascending-price generalized Vickrey auction. Paper presented at the Stanford Institute for Theoretical Economics Workshop: The Economics of the Internet: June 25-29, 2002.http://nrs.harvard.edu/urn-3:HUL.InstRepos:4101692A simple characterization of the equilibrium conditions required to compute Vickrey payments in the Combinatorial Allocation Problem leads to an ascending price Generalized Vickrey Auction. The ascending auc- tion, iBundle Extend & Adjust (iBEA), maintains non-linear and perhaps non-anonymous prices on bundles of items, and terminates with the ef- cient allocation and the Vickrey payments in ex post Nash equilibrium. Crucially, iBEA is able to implement the Vickrey outcome even when the Vickrey payments are not supported in a single competitive equilibrium. The auction closes with Universal competitive equilibrium prices, which provide enough information to compute individualized discounts to adjust the nal prices and implement Vickrey payments.en-USConference Paper2010-05-18