"Randomized experiments are the gold standard for causal inference, but they are not always feasible."
随机实验是因果推理的黄金标准,但它们并不总是可行的。
电子通讯永远无法替代一个人用灵魂鼓励另一个人勇敢真诚的面孔。
没有充足的食物供应,今天所知道的文明就不可能进化,也不可能生存。
Leadership is not about giving orders, it's about inspiring others to achieve greatness.