In the state of nature, indeed, all men are born equal, but they cannot continue in this equality. Society makes them lose it, and they recover it only by the protection of the laws.

I always tell my kids, 'If you're going to do something, do it well. And if you're not going to do it well, don't do it at all.'

布莱克-斯科尔斯模型的美妙之处在于它将期权定价问题简化为几个可观察的变量。