How Were So Many Economists So Wrong About the Recession?

By Tyler Cowen.

"That is the topic of my latest Bloomberg column, I thought it was time to call out all the Orwellian rewriting of intellectual history going on, so here goes:

As Treasury Secretary Janet Yellen said last week: “So many economists were saying there’s no way for inflation to get back to normal without it entailing a period of high unemployment, [or] a recession. And a year ago, I think many economists were saying a recession was inevitable. I’ve never felt there was a solid intellectual basis for making such a prediction.”

Many of those economists may have been relying on the work of … Janet Yellen. Her own (highly regarded) macro research focuses on nominal price and wage stickiness and output-inflation trade-offs, predicting that if there is a significant fall in aggregate demand, employment should also fall, giving rise to a recession. She is also co-author (with many distinguished colleagues) of a well-known paper arguing that there is an output/inflation trade-off even at high rates of inflation.

Economist Christina Romer (often with co-authors) has provided some of the most persuasive evidence that negative monetary policy shocks induce recessions in output and employment. Her work has been especially influential — worthy of a Nobel Prize, in my opinion — because it does not rely on a complicated mathematical model of the economy, and it had been accepted on a bipartisan basis. Paul Krugman has been predicting for most of this year that the recent disinflation would not cause a recession, and he deserves credit for getting this right. Yet he is less keen to tell us that for many years he trumpeted the predictive virtues of old-style Keynesian macroeconomics, using models that predict disinflation will lead to a loss in output and employment.

Krugman has lately further explained his position — complete with unironic headline — suggesting that the untangling of broken supply chains had helped lower the rate of inflation. That point, too, is correct. He didn’t mention that there also has been a massive negative shock to aggregate demand: High rates of M2 growth became slightly negative rates of M2 growth. Fiscal policy peaked and then retreated. The Fed raised interest rates from near-zero levels to the range of 5%, and fairly rapidly. It also sent every possible signal that it was going to be tight with monetary conditions.

…There is a reason that so many economists had been predicting a recession — and it is not because they are out of touch, or repeating talking points from Donald Trump’s presidential campaign. They predicted a recession because that is what experts such as Yellen, Krugman, Romer and many others had been teaching for decades. I do not myself presume to have any immunity from the general confusion here, as all along I thought there was a reasonable chance of a recession.

Larry Summers was wrong about the recession, but at least he has been consistent in his application of model-based reasoning, and now somehow he is the whipping boy for having done this.  Let’s hope that some historical memory holds and this one does not get swept under the rug…"