The evolution of collective choice under majority rules
用随机演化博弈论研究多数规则下集体选择的长期演化，发现孔多塞胜者是唯一长期均衡，若无则均衡属于顶循环集，并证明该方法可缓解社会选择中的不确定性问题。
A collective choice (or opinion) supported by a majority of individuals is challenged recurrently by a new one in a society. We consider a long-run evolution of collective choice under majority rules by stochastic evolutionary game theory. The Condorcet winner is uniquely a long-run equilibrium for all (super-)majority rules. When the Condorcet winner does not exist, the long-run equilibria under all majority rules belong to the top cycle set. In a multidimensional choice problem where the top cycle set tends to become the whole policy space, a long-run equilibrium belongs to the min–max policy set if the core is non-empty. We show that stochastic evolutionary game theory can mitigate the indeterminacy problem in social choice.