"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

Greatness comes from believing in yourself and your vision.

In the end, we all have to face the consequences of our actions, no matter how much we try to avoid them.

"A writer's duty is to tell the truth, no matter how painful."

The greatest scientists are the ones who never stop learning.

规模和价值效应在不同市场和时间段普遍存在，但其幅度可能有显著差异。

把一个简单的想法认真对待。