关键词: 非均衡状态, 双寡头动态竞争, 价格&mdash, 质量策略, 微分博弈

Abstract: To discuss price-quality competitive strategy optimization in disequilibrium,a dynamic model of duopoly price-quality competition was developed in the presence of asymmetric firm characteristics,the optimal price and quality trajectory were obtained by the approach of differential game,and the optimal price-quality strategy in disequilibrium was investigated.The research showed that the price-quality competition was in disequilibrium with medium and high consumer quality sensitivity;the competitive firms had incentive to adopt differentiation strategy that if one side chose quality-oriented strategy,the other would adopt price-oriented strategy with medium consumer quality sensitivity.Both the margin revenue gap and the differences of firm characteristics between two firms were key factors for strategy selection.When consumer quality sensitivity was in high level,two firms tended to adopt strategy of price war or quality war.The brand strength and the gap between price sensitivity and quality sensitivity were the determining factors for strategy selection.

Key words: disequilibrium state, dynamic duopoly competition, price-quality strategy, differential game