—— 请按键盘 空白键 开始游戏 ——

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."
人生は、自分が望むように生きるか、他人が望むように生きるかのどちらかだ。
在每一本书中,都有作者灵魂的一部分。
The market is always looking for the next big story.
Your most unhappy customers are your greatest source of learning.
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.