网络型资源、递增阶梯定价与两部制菜单的等价性

Network Resources,Increasing Block Tariff and Menu of Two-Part Tariffs: Equivalency

本文研究了在消费者收入信息不对称条件下兼顾效率与公平的规制当局的递增阶梯定价设计问题,证明了在网络型资源领域中递增阶梯定价与两部制定价菜单从修正性福利意义上的等价性。研究发现,如果不考虑需求随机性,任一递增阶梯定价机制总存在与之等价的两部制菜单。鉴于两部制菜单在数学处理上的便利性,最优递增阶梯定价的设计可以过渡为最优两部制定价菜单的设计。这样,将极大地简化最优递增阶梯定价的设计,也有利于评估和完善供电、供水、供气等网络型资源领域的阶梯定价改革效果。

Under asymmetric information on consumers’income,this paper investigates the implementation of increasing block pricing mechanismby balancing efficiency and equality.In particular,we prove that for provided-by-network resources,increasing block tariff is equivalent some menu of two-part tariffs.This result transforms the design of increasing block pricinginto equivalent menu of twopart tariffs.Our resultsignificantly simplifies the design of optimal increasing block pricingin provided-by-network resourcesand facilitates the assessment and improvement of increasing block pricing reform in supplyelectricity,water and so on.