垄断市场中双寡头企业的市场行为研究——从产品纵向差异的角度分析  

A Study on the Market Behavior of Duopolistic Enterprise in the Monopolistic Market:An Analysis of the Product Vertical Differentiation

作　　者：张福利[1] 施建军[2] 

机构地区：[1]南京审计学院数学与统计学院,江苏南京211815 [2]南京大学商学院,江苏南京210093

出　　处：《审计与经济研究》2010年第4期93-99,共7页Journal of Audit & Economics

摘　　要：从产品纵向差异的角度分析了垄断市场中双寡头企业的短期市场行为和长期市场行为。具体来说,从短期的角度出发,将产品质量视为外生变量,研究高质量企业和低质量企业的定价策略和利润状况,并对均衡结果进行比较静态分析。研究结果表明,两个企业都有提高或降低各自产品质量的动机,这取决于双方现有的质量水平。从长期的角度出发,将产品质量视为内生变量,研究企业的质量与价格决策。研究结果表明,产品质量存在唯一均衡,但均衡质量并没有表现出较大的差异化,而是表现出较小的差异化。此外,无论从短期还是长期的角度来看,企业都不存在高质量优势,而仅存在低质量优势。We study the short-term and long-term market behavior in a duopolistic market with vertical production differentiation. Starting from a short term, we consider product quality index as exogenous variable and examine monopolistic pricing strategy and profit. Moreo- ver, we give a comparative static analysis on equilibrium results. It is proved that both firms have an incentive to improve or decrease their respective product quality level, which depends on their existing quality level. Starting from a long term, we consider product quali- ty index as endogenous variable and analyze monopolistic product quality and pricing strategy. It is proved that there exists an unique product quality equilibrium, and the higher differentiation of product quality doesn＇t appear. It is worth pointing out that there exists a lower quality difference for two kinds of products. In addition, there is no high-quality advantage for the short-term or long-term market behavior. Besides, there exists a low-quality advantage for the short-term and long-term market behavior.

关 键 词：纵向差异 产品质量 低质量优势 转移价格 

分 类 号：F713.54[经济管理—市场营销]