Explain the meaning of a Nash equilibrium when firms are competing with respect to price. Why is the equilibrium stable? Why don't the firms raise their prices to the level that maximizes joint profits?
A.平衡
B.瓶颈
C.帕累托最优
D.纳什均衡
A.上策均衡是比纳什均衡更高的均衡概念
B.上策均衡的存在性比纳什均衡差
C.许多博弈没有上策均衡但有纳什均衡
D.上策均衡肯定是纳什均衡,但纳什均衡不一定是上策均衡
A.子博弈完美纳什均衡本身是一个纳什均衡
B.子博弈完美纳什均衡比纳什均衡概念更强
C.在子博弈完美纳什均衡中,不存在任何不可信的威胁或许诺
D.子博弈完美纳什均衡具备策略稳定性