An public, open, ascending-price auction, highest bidder pays their bid and wins
Multiple identical units. Winners pay same market-clearing price, highest lose bid or lowest win bid
Bidders place bids on bundled items rather than only single items. Useful for complements, complex
Bidder has one private bid. The highest bidder wins, pays the second-highest bid. Truth telling doms
Multi-unit extension second-price logic. Bidders bid for several units, pays opport. cost on others
An open, descending-price auction where the price starts high and falls until someone accepts it.
Combinatorial auction where bidders bid on packages as single bundles. Joint values > sum separately
Multiple auctions at same time over multiple rounds. Bidders switch across items as prices evolve
Each bidder submits one private bid without seeing others’ bids. Highest bidder wins, pays own bid.