A number of researchers have recently argued that the growth of the shadow banking system in the years preceding the recent U.S. financial crisis was driven by rising demand for "money-like" claims — short-term, safe instruments (STSI) — from institutional investors and nonfinancial firms....

Efforts in the United States to promote bank liquidity through reserve requirements, a minimum ratio of liquid assets relative to liabilities, extend at least as far back as the aftermath of the Panic of 1837. These requirements were quite important during the National Banking Era. Nevertheless,...