—— 请按键盘 空白键 开始游戏 ——

The best way to learn econometrics is by doing—working with real data and real problems.
The only thing worse than a rock star is a rock star with a cause.
成功的真正标准是让土地比我们发现时更好。
The success of any political system depends on its ability to generate legitimacy in the eyes of its citizens.