中文摘要：

不同消费者对同一商品的感知价值往往不同．基于此差异的商品感知价值和对企业供货率的理性估计，消费者选择一个企业购买商品．垄断市场下，企业的最优进货量和供货率随着最优价格的上升而增加．由于消费者对商品感知价值分布密度的非单调性，企业的局部最优定价不一定等于其全局最优定价．在含有n个企业的竞争市场下，求出了稳定状态下的纳什均衡解并且证明了其唯一性．当企业数量n为有限个时，企业有可能采取不同的最优定价，在除两处特殊区域以外，所有企业均获得相同的最优利润．当企业数量n无限大时，所有企业的最优利润相同．

英文摘要：

Different customers attach different perceived values to the same products. And a customer chooses a firm based on such a difference in perceived values and his rational expectation of the firm＇s product availability. In a monopoly market, a firm＇s optimal quantity and product availability increase with its optimal price. Due to the non-monotonicity of distribution density from customers＇ perceived values, a firm＇s local optimal price is not necessarily equal to its global optimal price. In a competitive market with n firms, the pure Nash equilibrium result was solved and its uniqueness proved. When n is finite, firms may adopt different optimal prices, and all firms achieve the same optimal profit expect in two special conditions. However, when n is infinite, all firms share a same cmtimnl nrnfit ~ ~l;I..;..~