合谋

问题如下：

Collusion is less likely in a market when:

选项：

A.

the product is homogeneous.

B.

companies have similar market shares.

C.

the cost structures of companies are similar.

解释：

B is correct.

When companies have similar market shares, competitive forces tend to outweigh the benefits of collusion.

考点：合谋

解析：如果市场上大家份额差不多，那么大家就都有机会做老大，就容易心怀鬼胎，合谋就不容易产生。

如果有一个厂商份额比较多，反倒容易组织大家形成合谋。所以B选项入选。

当长生门生产产品同质化严重，并且成本相似的时候，合谋也容易形成，所以A,C不入选。