工具变量的美妙之处在于它们让我们以新的视角看世界。

Institutions matter more than we sometimes acknowledge.

Innovation is the lifeblood of any successful business. Without it, companies stagnate and die.

科学的美丽在于它通过观察和实验来解释自然世界的能力。

Ideas are like fish. If you want to catch little fish, you can stay in the shallow water. But if you want to catch the big fish, you've got to go deeper.