是一道产业经济学的题目，要用英文回答。各路大神！！！！

我正好在复习= =不过产经学的是中文的，
我试试吧~
这里说的是市场势力~
The answer.
There are three points which decide the market power.
The first is the product differentiation, which help the manufacturer have the specific products that conform to the most customer's preference. thus ,in the specific market , it defeats the opponents/
the second is industry barriers,which protect the incumbents with the threat form the entris .
the last is the concentration ratio(抱歉我不知道集中度的专有名词）, which decides the size of the business , and to a certain degree , the size of the enterprise reflects the market power. So there are intense relations between the both,

what factors decides the degree of market power？？？？？

什么因素决定了市场力量的程度? ? ? ?
答案中文告诉我我翻译