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arXiv 1601.06223cs.GT
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具有随机权的加权投票对策的Shapley值

Shapley Values in Weighted Voting Games with Random Weights

Yuval Filmus, Joel Oren, Kannan Soundararajan

摘要:

我们研究的Shapley-Shubik值在加权投票游戏中的代理商是随机确定的分布。在典型的集体决策系统中,Shapley-Shubik值衡量代理人的投票权。虽然根据加权投票游戏的参数很容易根据经验进行估计,但沙普利值却很难通过分析进行推理。我们提出了一种概率的方法,在该方法中,代理权重独立同分布。从某种已知的指数衰减分布我们提供了一个一般的封闭形式的最高和最低预期Shapley值在这样的游戏中,作为一个函数的参数的基础分布的表征。要做到这一点,我们给出了一个新的重新解释的随机过程,产生的Shapley变量作为一个更新过程。我们证明了我们的结果的使用均匀分布和指数分布。此外,我们在几个合成数据集上显示了我们的理论预测的强度。

英文摘要:

We investigate the distribution of the well-studied Shapley--Shubik values in weighted voting games where the agents are stochastically determined. The Shapley--Shubik value measures the voting power of an agent, in typical collective decision making systems. While easy to estimate empirically given the parameters of a weighted voting game, the Shapley values are notoriously hard to reason about analytically. We propose a probabilistic approach in which the agent weights are drawn i.i.d. from some known exponentially decaying distribution. We provide a general closed-form characterization of the highest and lowest expected Shapley values in such a game, as a function of the parameters of the underlying distribution. To do so, we give a novel reinterpretation of the stochastic process that generates the Shapley variables as a renewal process. We demonstrate the use of our results on the uniform and exponential distributions. Furthermore, we show the strength of our theoretical predictions on several synthetic datasets.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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