The beauty of instrumental variables is that they allow us to see the world in a new light.
工具变量的美妙之处在于它们让我们以新的视角看世界。
A man's real possession is his memory. In nothing else is he rich, in nothing else is he poor.
我不会告诉他们裁员的事。如果病人得了癌症,你不会告诉他们。
I’ve never lost a game, I just ran out of time.
I wonder how many people I've looked at all my life and never seen.
Intelligence emerges from the interaction of simple processes.