一、“科斯定理”能避免同义反复吗？对科斯定理，现有三种表述是比较公认的。第一种表述是：只要允许自由交换，不管产权最初是怎样界定的，最终都能使社会总产值达到最大化，即达到帕累托最优状态。这种表述可概括为自由交换论。第二种表述是：如果交易费用为零，不管产权最 First, “Coase Theorem” can avoid synonymous repeated? The Coase theorem, the existing three statements is more recognized. The first is that whenever free exchange is permitted, no matter how property rights were initially defined, ultimately the total social output can be maximized, that is, the Pareto optimality can be achieved. This statement can be summarized as free exchange theory. The second statement is: If transaction costs are zero, regardless of property rights