PARETO EFFICIENCY AND WEIGHTED MAJORITY RULES
研究了在无货币转移的两人两方案环境中，激励相容的决策规则是加权多数规则，并刻画了哪些加权多数规则是事前激励有效的。
We consider the design of decision rules in an environment with two alternatives, independent private values and no monetary transfers. The utilitarian rule subject to incentive compatibility constraints is a weighted majority rule, where agents' weights correspond to expected gains given that their favorite alternative is chosen. It is shown that a rule is interim incentive efficient if and only if it is a weighted majority rule, and we characterize those weighted majority rules that are ex ante incentive efficient. We also discuss efficiency in the class of anonymous mechanisms and the stability of weighted majority rules.