Truthful Approximation Schemes for Single-Parameter Agents

  • Authors:
  • Peerapong Dhangwatnotai;Shahar Dobzinski;Shaddin Dughmi;Tim Roughgarden

  • Affiliations:
  • pdh@cs.stanford.edu and shaddin@cs.stanford.edu and tim@cs.stanford.edu;shahard@cs.huji.ac.il;-;-

  • Venue:
  • SIAM Journal on Computing
  • Year:
  • 2011

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Abstract

We present the first monotone randomized polynomial-time approximation scheme (PTAS) for minimizing the makespan of parallel related machines ($Q||C_{\max}$), the paradigmatic problem in single-parameter algorithmic mechanism design. This result immediately gives a polynomial-time, truthful (in expectation) mechanism whose approximation guarantee attains the best-possible one for all polynomial-time algorithms (assuming $P\neq NP$). Our algorithmic techniques are flexible and also yield a monotone deterministic quasi-PTAS for $Q||C_{\max}$ and a monotone randomized PTAS for max-min scheduling on related machines.