建筑真正的考验是它如何老化。

过去是一个异国他乡；他们在那里的行事方式不同。

We don’t start with models. We start with data. We don’t have any preconceived notions. We look for things that can be replicated thousands of times. A trouble with convergence trading is that you don’t have a time scale. You say that eventually things will come together.Well， when is eventually？