The bitterest creature under heaven is the wife who discovers that her husband's bravery is only bravado.
The best way to learn econometrics is by doing—working with real data and real problems.
我对制作美丽的物品不感兴趣，我对制作有意义的系统感兴趣。
The modern state is characterized by its ability to concentrate and use power in a way that premodern states could not.