CAJ | 학술논문

经典的古诺博弈、斯坦克尔博格博弈和伯川德博弈在市场是完全信息化且产品同质性的情况下得出了各自的纳什均衡解。然而，现实经济社会中的寡头垄断市场难以满足产品同质性的假设。因此，通过放宽经典模型中的“产品同质化”这一假设，可从异质性产品市场的角度出发，比较分析三大博弈的纳什均衡结果，并探究在斯坦克尔博格博弈中，先动厂商的均衡利润相较于其他两个博弈的均衡利润是否存在比较优势。研究结果表明，由于产品的可替代性和互补性的不同，三大博弈的市场均衡结果之间存在显著区别。但斯坦克尔博格博弈的先动厂商无论在产品是可替代品或互补品的情况下，其均衡利润都大于古诺博弈及伯川德博弈的均衡结果。
경전적고낙박혁、사탄극이박격박혁화백천덕박혁재시장시완전신식화차산품동질성적정황하득출료각자적납십균형해。연이，현실경제사회중적과두롱단시장난이만족산품동질성적가설。인차，통과방관경전모형중적“산품동질화”저일가설，가종이질성산품시장적각도출발，비교분석삼대박혁적납십균형결과，병탐구재사탄극이박격박혁중，선동엄상적균형리윤상교우기타량개박혁적균형리윤시부존재비교우세。연구결과표명，유우산품적가체대성화호보성적불동，삼대박혁적시장균형결과지간존재현저구별。단사탄극이박격박혁적선동엄상무론재산품시가체대품혹호보품적정황하，기균형리윤도대우고낙박혁급백천덕박혁적균형결과。
The classic Cournot game,Stackelberg game and Bertrand game indicate the Nash equilibrium solutions under the hypothesis of complete information and product homogeneity market.However,the reality about oligopoly market is hard to satisfy the above hypothesis.This paper broadens the hypothesis of product homogeneities in the classic models,and compares the Nash equilibrium solutions of the three games from the perspective of product heterogeneity.Further,this paper researches that if there is a comparative advantage for the leading firms’Equilibrium profit in the model of Stackelberg game,compared to the other two game equilibrium profits.The result shows that,the outcomes of market equilibrium are dramatically different in these three models,due to the difference between complementary and substitutable products.The equilibrium profit in Stackelberg game is higher than the ones in other two games,no matter whether the products are substitutes or complements.