【摘要】 信息产品自身的特点决定了信息产品的定价规则不是最优的。因此 ,信息产品的价格只能寻求一种次优价格。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提高也受到一些条件的制约。更多还原

【Abstract】 The pricing of information product is not the first-best one but a second-best one due to its own characteristics. Compared with average cost in the condition of equilibrium, two-part pricing results in a Pareto improvement and an increase of social welfare in certain conditions.更多还原