agents just like A

不仅仅是这两个个体
and a million agents just like B.

而是所有与他们相似的代理人
The heart of perfect competition in the economy is

经济学中完全竞争的核心是
that there's lots of people, and so we can't--yeah,

有众多参与者并且我们不能...对
I think from now on hand them in at the end of class.

我认为从现在开始计时下课交上来
So we mean a million people of type A and a million people type B.

所以我们所指所有的代理人A和代理人B
So the utility function of A, the welfare function of A is

所以A的效用函数即A的福利函数
written there, and the welfare function of B

就是这个 B的福利函数在这里
is written and they each begin with endowments.

他们都以基金资产起家
So when these two million people come together they're

当这两拨人聚在一起的时候
going to be doing the same thing

你们就会看到第一节课上发生的情景
that you saw in the class on the first day.

也发生在他们中间