laban definition of financial crisis in these major economies in the post-world war ii period and we look at what was true in the five years leading up to that crisis. we looked at private debt growth gdp and it creates 28 different factors. when you do that the results were overwhelming. it's almost always true that you have private debt growth and almost never true that you have a predominance of any other increase. that was our analysis. >> so you only examined the correlation between these factors. >> that's right. >> thank you. >> do you have time for a few more questions? in the back and did you ask a question and? >> your work is fabulous. how do you see addressing credit and financial asset prices? there are some like steve king who have spent a lifetime talking about this and others as well that credit expansion up assess -- access crisis feeds on itself. you want to buy a house because prices are going up so you leverage the buy the house which in turn makes houses less affordable and ironically many of the affordable housing ngos you know don't really have a solution how t