It is now rather common to argue that those economists who anticipated the crisis anticipated the wrong crisis – a dollar crisis, not a banking crisis. Robin Harding of the FT writes:
“If economists try to predict crises they will get it wrong, and that will reduce their credibility when they try to warn of risks. It was in their warnings that economists failed: plenty talked of ‘global imbalances’ or ‘excessive credit growth’; few followed that through to the proximate sources of danger in the financial system, and then forcibly argued for something to be done about it.”
Free exchange made a similar point last week.
“It’s interesting that he [Krugman] mentions Nouriel Roubini, who is one of several international economists who famously saw some sort of crisis on the horizon but who very much erred in guessing the precipitating factor. I think international macroeconomists have been looking for a dollar crisis for quite some time, and they believed that such a crisis would bring on the meltdown. Instead, the meltdown occurred for other reasons and paradoxically reinforced the position of the dollar (and, for the moment, many of the structural imbalances that have troubled international economists).”
Actually, the crisis has — at least temporarily — reduced those structural imbalances. The US trade deficit is much smaller now than before. And, be honest, the criticism directed at Dr. Roubini should have been directed at me: after 2005, the locus of Nouriel’s concerns shifted to the housing market and the financial sector, while I continued to focus on the risks associated directly with the US external deficit. But it is hard to argue against the conclusion that the current crisis stems, fundamentally, from the collapse in the financial sector’s ability to intermediate the US household deficit – not a collapse in the rest of the world’s willingness to accumulate dollars. The chain of risk intermediation broke down in New York and London before it broke down in Beijing, Moscow or Riyadh.
At the same time, I also think the argument that warnings about “imbalances” (meaning the US trade deficit) were wrong neglects one important thing: there was something of a balance of payments crisis in 2007, although it took a very unusual form. When US growth slowed and global growth did not, private investors (limited) willingness to finance the US deficit disappeared. Consider the following graph, which plots (net) private demand for US long-term financial assets (it is based on the TIC data, but I have adjusted the TIC data for “hidden” official inflows that show up in the Treasury’s annual survey of foreign portfolio investment) against the US trade deficit.