is it the fact that they can't communicate?

但人们选α是因为不能交流吗
Suppose you'd been able to talk before hand,

假设你们交上来之前约好了
so suppose the woman here whose name was? Mary.

比如这位女士叫什么来着玛丽
had been able to talk to the person next to her whose name is? Erica.

她跟旁边的男生约好他叫艾瑞克
And they said, suppose we know we're going to be paired together,

他俩这么商量的咱俩会被分到一组
I'll choose Beta if you choose Beta. Would that work?

你要是选β我也选β 这会成功吗
Why wouldn't that work?

为什么不会成功
There's no enforcement.

因为缺乏强制力
There's no enforcement.

因为缺乏强制力
So it isn't a failure of communication per se.

所以说本质上不是缺少沟通
A contract is more then communication,

协议的效力大于口头约定
a contract is communication with teeth. It actually changes the payoffs.

协议是有违约责任的它影响收益