The real shame about the ending of the Guns N' Roses when I got kicked out wasn't just that I got kicked out, but Slash and Axl stopped working together. ↗
Alan White and I spent the next two or three years working together on this. We developed what is known a stochastic volatility model. This is a model where the volatility as well as the underlying asset price moves around in an unpredictable way. ↗
We have such a good time working together. It makes such a difference going to work every day for 14 hours and being able to hang out and have a good time. ↗