理解布莱克-斯科尔斯模型的关键在于认识到它是基于风险中性世界的概念,在这个世界中投资者对风险漠不关心。
每一天都是改变生活的新机会。
The best way to predict the future is to create it.
The Internet should be a tool for empowerment, not control.
生活太重要了,不能太当回事。
Education is one of the most powerful tools we have for reducing inequality and promoting social mobility.