| Article ID: | iaor20104466 |
| Volume: | 39 |
| Issue: | 3 |
| Start Page Number: | 503 |
| End Page Number: | 510 |
| Publication Date: | Jul 2010 |
| Journal: | International Journal of Game Theory |
| Authors: | Lamy Laurent |
| Keywords: | game theory |
Day and Milgrom (2008) argue that package auctions that select the seller's minimum revenue in the Core are revenue-monotone. We show that no bidder-optimal Core-selecting auction can satisfy revenue-monotonicity for general preferences when there are at least three goods for sale, while the property holds for any bidder-optimal Core-selecting auction in environments with only two goods or if the characteristic function is submodular.