In August 2008 I joined the Board of Governors of the Federal Reserve System, leaving behind a 30-year career as a commercial banker to become a central banker. My time as a commercial banker spanned numerous business cycles. It also encompassed at least one severe financial system crisis, in the late 1980s through the early 1990s, albeit one that was not as severe as the current one. From my time as a commercial banker, I already understood the factors considered by bankers in the initial lending...