政府“复合购买”策略下的公共品需求满足模型

Modeling the satisfication of demand for public goods under government combined purchase strategies

文章引入新市场财政学的“市场平台观”理论视角,考虑政府同时采取财政补贴和政府供给的复合购买策略满足居民公共品需求的情况.基于市场垂直竞争框架,建立政府、厂商、消费者三方博弈模型,分别分析了复合购买策略的有效性和适用范围,并将不同复合购买策略的政府成本进行了比较.研究表明,复合购买策略在高成本或低偏好的市场结构特征下能够有效保障居民的公共品需求,政府可通过补贴低质量厂商与供给高质量产品的复合购买策略来削减政府成本.在实践中,政府应当重点观察公共品市场的市场结构特征,分别在低质量市场和高质量市场采取财政补贴和政府供给策略.

Based on the Neo-public Finance Theory’s Market Platform View,this paper establishes,applying vertical competition theory,a three-party game model to discuss the case where the government uses combined purchase strategies of fiscal subsidy and direct supply to satisfy the demand for public goods.This paper analyzes the combined purchase strategies’validity and application,and compares each strategy’s cost.The results show that under high-cost or low-preference market feature,the combined purchase strategies can effectively satisfy the demand for public goods,and that the government can minimize the cost by subsidizing low-quality firm and directly supplying high-quality product.In practice,the government should observe the market features and use fiscal subsidy/direct supply strategy on low-quality/high-quality markets.