当随机化不可行时,匹配方法可以是一个强大的工具。
"Matching methods can be a powerful tool when randomization is not possible."
Active management is a negative-sum game before costs and a loser's game after costs.
I don’t believe in the possibility of absolute truth in art.
我们的生活在我们选择沉默面对重要事情的那一刻开始走向终结。