Efficiency is doing things right; effectiveness is doing the right things.

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

If you want to be successful, you have to be willing to make tough decisions.

人类就像江河一样：木杖刚把波浪划开，波浪又立刻流到一起去了。

The poet is a liar who always speaks the truth.

"Leadership is about creating an environment where people can thrive."