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本文基于一个两期的耐用品双寡头竞争模型,假定企业先内生化其跨期策略(产品耐用度和租售),然后进行产量竞争,探讨了企业间的产品差异(Horizontal product differentiation)对企业跨期策略行为及其社会福利的影响。结论表明:①企业之间的产品差异程度决定了企业的跨期策略行为,当产品替代或互补程度很高时,企业偏好生产耐用品并实施出售;当产品替代或互补程度较低时,企业偏好生产非耐用品(或生产耐用品但是选择出租),这与Goering(2007)的结论截然不同;②社会福利与企业的两类跨期策略行为都有关,其中,同时生产并出售耐用品的企业个数越多,社会福利越大;③受产品差异和企业内生化跨期策略的影响,仅对耐用品行业实施“限租许售”(早期的反垄断政策之一)并不能提高社会福利。
Based on a two-period duopoly competition model for durables, we assume that firms first endogenize their intertemporal strategy (product durability and rental) and then compete for output. The article discusses how Horizontal product differentiation can affect firms Intertemporal Strategy Behavior and Its Social Welfare Impact. The results show that: (1) The degree of product differentiation between enterprises determines the intertemporal strategic behavior of enterprises. When the product substitution or complementarity is high, the enterprises prefer to produce durable goods and sell them. When the product substitution or complementarity is low, The preference for producing non-durable goods (or producing durable goods but opting out) is quite different from that of Goering (2007); ② Social welfare is related to both types of intertemporal strategic behaviors of enterprises, where the simultaneous manufacture and sale of durable goods ③ The more the number of enterprises, the greater social welfare; ③ by product differentiation and the impact of internal biochemical cross-term strategy, only the durables industry to implement “rent restrictions” (early antitrust policy) does not Improve social welfare.