Solution to Exchanges 9.1 puzzle: borrowing as cheaply as possible

This is a solution to the editors puzzle from Issue 7.2 of SIGecom Exchanges. The puzzle is about predicting what products one can expect to see in a market with given positive and negative synergies between products. The full puzzle can be found online ...

This is a solution to the editor's puzzle from Issue 7.1 of SIGecom Exchanges. The puzzle is about solving an instance of the winner determination problem and providing a proof of optimality. The full puzzle [Conitzer] can be found online at http://...

This is a solution to the editor's puzzle from issue 10.2 of SIGecom Exchanges [Reeves 2011]. The Puzzle asks to determine a point in time such that a lump sum payment of $S will be equivalent to a continuous stream of infinitesimal payments totaling $S,...