. For any number of objects and bidders, both the pure bundling auction and separate, efficient auctions for the single … objects are revenue-inferior to an auction that involves mixed bundling. …

Inspired by some spectrum auctions, we consider a stylized license auction with incumbents and one entrant. Whereas the … proactively encourages entry and restricts incumbent bidders. In this framework, an English clock auction gives rise to an … auction, an English clock auction with exit option that allows the entrant to annul his bid, and an English clock auction with …