我从未怀疑过自己。
We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love... and then we return home.
In the vastness of the universe, our problems seem small, yet our potential for understanding is limitless.
Innovation is seeing what everybody has seen and thinking what nobody has thought.
The best way to learn econometrics is by doing—working with real data and real problems.
永远不要低估合作的力量。
像接力赛般传递爱意