I have been warning for several months that the current mix of persistently loose monetary, credit, and fiscal policies will excessively stimulate aggregate demand and lead to inflationary overheating. Compounding the problem, medium-term negative supply shocks will reduce potential growth and increase production costs. Combined, these demand and supply dynamics could lead to 1970s-style stagflation (rising inflation amid a recession) and eventually even to a severe debt crisis.

Until recently, I focused more on medium-term risks. But now one can make a case that “mild” stagflation is alre...