Strategy Proof Mechanisms for Facility Location at Limited Locations

17 Sep 2020  ·  Toby Walsh ·

Facility location problems often permit facilities to be located at any position. But what if this is not the case in practice?.. What if facilities can only be located at particular locations like a highway exit or close to a bus stop? We consider here the impact of such constraints on the location of facilities on the performance of strategy proof mechanisms for locating facilities.We study four different performance objectives: the total distance agents must travel to their closest facility, the maximum distance any agent must travel to their closest facility, and the utilitarian and egalitarian welfare.We show that constraining facilities to a limited set of locations makes all four objectives harder to approximate in general. read more

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