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Better with Byzantine: Manipulation-Optimal Mechanisms

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Algorithmic Game Theory (SAGT 2009)

Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 5814))

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Abstract

A mechanism is manipulable if it is in some agents’ best interest to misrepresent their private information. The revelation principle establishes that, roughly, anything that can be accomplished by a manipulable mechanism can also be accomplished with a truthful mechanism. Yet agents often fail to play their optimal manipulations due to computational limitations or various flavors of incompetence and cognitive biases. Thus, manipulable mechanisms in particular should anticipate byzantine play. We study manipulation-optimal mechanisms: mechanisms that are undominated by truthful mechanisms when agents act fully rationally, and do better than any truthful mechanism if any agent fails to act rationally in any way. This enables the mechanism designer to do better than the revelation principle would suggest, and obviates the need to predict byzantine agents’ irrational behavior. We prove a host of possibility and impossibility results for the concept which have the impression of broadly limiting possibility. These results are largely in line with the revelation principle, although the considerations are more subtle and the impossibility not universal.

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Othman, A., Sandholm, T. (2009). Better with Byzantine: Manipulation-Optimal Mechanisms. In: Mavronicolas, M., Papadopoulou, V.G. (eds) Algorithmic Game Theory. SAGT 2009. Lecture Notes in Computer Science, vol 5814. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-04645-2_7

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  • DOI: https://doi.org/10.1007/978-3-642-04645-2_7

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-04644-5

  • Online ISBN: 978-3-642-04645-2

  • eBook Packages: Computer ScienceComputer Science (R0)

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