Winner-Imposing Strategyproof Mechanisms for Multiple Facility Location Games

We study Facility Location games, where a number of facilities are placed in a metric space based on locations reported by strategic agents. A mechanism maps the agents' locations to a set of facilities. The agents seek to minimize their connection cost, namely the distance of their true location to the nearest facility, and may misreport their location. We are interested in mechanisms that are strategyproof, i.e., ensure that no agent can benefit from misreporting her location, do not resort to monetary transfers, and approximate the optimal social cost. We focus on the closely related problems of k-Facility Location and Facility Location with a uniform facility opening cost, and mostly study winner-imposing mechanisms, which allocate facilities to the agents and require that each agent allocated a facility should connect to it. We show that the winner-imposing version of the Proportional Mechanism (Lu et al., EC '10) is stategyproof and 4kapproximate for the k-Facility Loca...

• Type: Journal
• Year: 2010
• Where: WINE
• Authors: Dimitris Fotakis, Christos Tzamos
• Keywords: Economy, Facility Location Game, K-facility Location, WINE 2010, Winner-imposing Version