Seen from the perspective of game theory, "incentive compatibility" has reached the state of "Nash balance", the necessary condition to reach Pareto Optimality.
从博弈理论的角度来看，“激励相容”达到的是一个“纳什均衡”状态，这是达到帕累托最优的必要条件。
Compared with the average cost pricing in the condition of equilibrium, the two-part tariff results in a Pareto improvement and an increase of welfare when meeting some certain conditions.
与以收支平衡为条件的平均成本价相比，二部定价实现了帕累托改进，提高了社会福利。但是二部定价对社会福利的增加也应该满足一定的条件。
We can see that taxing on E-commerce is the important condition for Pareto efficiency, based on the analysis about the conditions for Pareto efficiency;
通过对实现帕累托最优条件的分析，我们可以看出，对电子商务征税是实现帕累托最优的重要前提；
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