So the issue is going to be which firm does each consumer go and buy their product from.
所以问题变成了每个消费者,去哪家公司买东西
Each consumer is going to buy one product, either from Firm 1 or from Firm 2.
每个消费者会买一个产品,从公司1买或者从公司2买
We'll assume that each consumer buys one and only one product.
我们假设每个消费着买且只买一个产品
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