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。
时间总是一个惊喜。你以为你了解它,但其实你并不了解。
We thought that we had the answers, it was the questions we had wrong.
Your margin is my opportunity.
我想成为我一直想成为的样子——统治性的。
思想塑造历史的进程。