不完全竞争中的价格信息

完全竞争市场中的人被假定拥有充分的信息和处理信息的能力 ,因此 ,价格被假定只需包含供求均衡与否的信息 ,市场出清只需价格与供求的相互作用就可以实现。现实的市场是不完全竞争的 ,信息变化的偶然性、主体知识的有限性、机会主义与道德风险导致了不完全信息 ,导致了价格信息的非真实性 ,使得价格和供求的相互作用不再能使市场出清。卖主的控价行为等 ,不能消除信息不完全 ,但可减少不完全竞争中的效率损失 ,有助于配合价格机制建设高效率的不完全竞争市场模型

Price information in incomplete competition

The man supposed to be in a complete competition market would have the abilities to hold sufficient information and deal with them, and therefore price is supposed to contain merely the information about supply and demand, and market clearing could be achieved only by the interaction between price and the supply and demand. Real markets are incompletely competitive, changes of information are casual, knowledge of subjects are limited, and opportunities and moral risks are common; all of these result in misinformation of price and no longer make market clearing. Acts such as sellers' pricecontrolling cannot eliminate incomplete information, but can reduce the loss of efficiency in incomplete competition, and help to establish a highefficient model in incompletely competitive market.