第六讲　非完全竞争的信息市场　　我们已经知道 ,我们所做的一切努力就是要使市场均衡正好等于社会经济效率水平 ,从而实现各种资源的最有效配置。但并非所有的商品和服务都能如此 ,正如我们在前两次讲座中提到的 ,如果市场的成本收益不能被消费者认识到 ,如果成本和收益无法? Sixthly, imperfectly competitive information markets We already know that all we have to do is to make the market equilibrium exactly equal to the level of socio-economic efficiency so as to achieve the most efficient allocation of resources. But not all goods and services can be so. As we mentioned in the two previous lectures, if the cost-benefit of the market can not be recognized by consumers, if the costs and benefits can not be?