Natural experiments are a powerful tool for understanding causal relationships in the real world.

最成功的企业是那些能够快速适应变化，同时忠于其核心价值观的企业。

"I’ve always tried to stay true to myself and my values."

The true power of mathematics is not in its complexity, but in its simplicity and elegance.

商业上的伟大成就从来不是一个人完成的，而是由一群人共同完成的。

一段不幸的婚姻不是缺乏爱，而是缺乏友谊。