为何完全竞争厂商不必要也不愿意去投资为自己的产品做广告？

Question

从经济学原理方面考虑怎么回答这个问题？

Answer 1

完全竞争市场的特点：产品无差异，资源自由流动，市场信息完整。这种情况下厂商和消费者都是价格的接受者，价格决定一切。本身无差异的产品，何必花钱去做广告？有这个钱还不如花在成本控制方面。基于思维定式，很多人都会想到做广告带来效益，但是做广告的结果也就是突出产品的差异性（如品牌、质量等等），但是如果产品有差异，就成了垄断竞争市场。

Answer 2

1.Does Nicole like geography and history?2.What do you like very
much?3.They didn't play soccer last afternoon.4.How do you like Talk
Show?5.He showed his photos to me yesterday.6.I don't have to wear a
unifrom at school.7.Does she have to stay at home on sundays.8.don't
arrive late for class.9.There is no photos here.