Cecchetti & Schoenholtz:
Higher capital requirements didn't slow the economy: During the debate over the 2010 Basel III regulatory reform, one of the biggest concerns was that higher capital requirements would damage economic growth. Pessimists argued that forcing banks to increase their capitalization would lower long-run growth permanently and that the transitional adjustment would impose an extra drag on the recovery from the Great Recession. Unsurprisingly, the private sector saw catastrophe, while the official sector was more positive.
The Institute of International Finance’s (IIF) 2010 report is the most sensational example of the former and the Macroeconomic Assessment Group (MAG) one of the most staid cases of the latter. The IIF concluded that banks would need to increase capital levels dramatically and that this would drive lending rates up, loan volumes down and result in an annual 0.6-percentage-point hit to GDP growth in the United States, the euro area and Japan. By contrast, the MAG reported that the implied increase in capital would drive lending rates up only modestly, loan volumes down a bit, and result in a decline in growth of only 0.05 percentage point per year for five years – one-twelfth the IIF’s estimate.
Four years on we can start to take stock, and our reading of the evidence is that the optimistic view was correct. Since the crisis, capital requirements and capital levels have both gone up substantially. Yet, outside the still-fragile euro area, lending spreads have barely moved, bank interest margins have fallen and loan volumes are up. To the extent that more demanding capital regulations had any macroeconomic impact, it would appear to have been offset by accommodative monetary policy. ...
[There is much, much more in the post.]