Natural experiments can provide valuable insights into economic questions.
You have to fight for every point like it’s the last one.
The world is a great fire, and we are the sparks.
物理学家必须拥有生动的想象力,但必须受到严格逻辑的约束。
法律体系的存在取决于官员对次要规则的接受。
The best way to predict the future is to create it.