Natural experiments are a powerful tool for understanding causal relationships in the real world.
逝者通过他们留下的分子向我们诉说。
The bond market is the ultimate indicator of market confidence.
认为有一个钟声会告诉投资者何时进入或退出市场的想法根本不可信。
The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.