心灵是一个不断展开的过程。
The best way to learn econometrics is by doing—working with real data and real problems.
成功的关键是专注于目标,而不是障碍。
每一本书都是一个世界,作者是那个世界的创造者,读者则是那个世界的探索者。
The new source of power is not money in the hands of a few, but information in the hands of many.
The past is never dead. It's not even past.