My opinion in this regard is that policymakers should refrain from a wild goose chase in pursuit of ever higher firewalls. Making the firewalls higher and higher will not resolve the crisis. Instead, policymakers should care that firewalls do not fall into a credibility trap owing to unavoidable political or financial constraints. Generally speaking, a firewall cannot extinguish a fire.
I became intrigued by books on finance, and, hence, at NYU I majored first in finance and, as my interest broadened, in economics and in what was then called mathematical statistics and now econometrics. In retrospect, that choice probably was not surprising since math was my most engaging course in high school. I graduated and joined an economic research organization.