Yannai A. Gonczarowski

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A protocol <i>P</i> is <i>Pareto-optimal</i> if no protocol <i>Q</i> can decide as fast as <i>P</i> for all adversaries, while allowing at least one process to decide strictly earlier, in at least one instance. Pareto optimal protocols cannot be improved upon. We present the first Pareto-optimal solutions to consensus and <i>k</i>-set consensus for(More)
The Gale-Shapley algorithm for the Stable Marriage Problem is known to take Θ(n 2) steps to find a stable marriage in the worst case, but only Θ(n log n) steps in the average case (with n women and n men). In 1976, Knuth asked whether the worst-case running time can be improved in a model of computation that does not require sequential access to the whole(More)
Coordinating activities at different sites of a multi-agent system typically imposes epistemic constraints on the participants. Specifying explicit bounds on the relative times at which actions are performed induces combined temporal and epistemic constraints on when agents can perform their actions. This paper characterises the interactive epis-temic state(More)
Lying in order to manipulate the Gale-Shapley matching algorithm has been studied by Dubins and Freedman (1981) and by Gale and Sotomayor (1985), and was shown to be generally more appealing to the proposed-to side (denoted as the women in Gale and Shapley's seminal paper (1962)) than to the proposing side (denoted as men there). It can also be shown that(More)
Many two-sided matching markets, from labor markets to school choice programs, use a clearinghouse based on the applicant-proposing deferred acceptance algorithm, which is well known to be strategy-proof for the applicants. Nonetheless, a growing amount of empirical evidence reveals that applicants misrepresent their preferences when this mechanism is used.(More)
Lying in order to manipulate the Gale-Shapley matching algorithm has been studied in [2] and [3] and was shown to be generally more appealing to the proposed-to side (denoted as the women in [1]) than to the proposing side (denoted as men there). It can also be shown that in the case of lying women, for every woman who is better-off due to lying, there(More)