I’ve been revisiting economic policy debates since 2008, and what stands out from around 2010 onward is the huge divergence in thinking that emerged between the United States and Europe. In America, the White House and the Federal Reserve mainly stayed faithful to standard Keynesian economics. The Obama administration wasted a lot of time and effort pursuing a so-called Grand Bargain on the budget, but it continued to believe in the textbook proposition that deficit spending is actually a good thing in a depressed economy. Meanwhile, the Fed ignored ominous warnings that it was “debasing the dollar,” sticking with the view that its low-interest-rate policies wouldn’t cause inflation as long as unemployment remained high.

In Europe, by contrast, policy makers were ready and eager to throw textbook economics out the window in favor of new approaches. The European Commission, headquartered here in Brussels, eagerly seized upon supposed evidence for “expansionary austerity,” rejecting the conventional case for deficit spending in favor of the claim that slashing spending in a depressed economy actually creates jobs, because it boosts confidence. Meanwhile, the European Central Bank took inflation warnings to heart and raised interest rates in 2011 even though unemployment was still very high.

But while European policy makers may have imagined that they were showing a praiseworthy openness to new economic ideas, the economists they chose to listen to were those telling them what they wanted to hear. They sought justifications for the harsh policies they were determined, for political and ideological reasons, to impose on debtor nations; they lionized economists, like Harvard’s Alberto Alesina, Carmen Reinhart, and Kenneth Rogoff, who seemed to offer that justification. As it turned out, however, all that exciting new research was deeply flawed, one way or another.

And while new ideas were crashing and burning, that old-time economics was going from strength to strength. Some readers may recall that there was much scoffing at predictions from Keynesian economists, myself included, that interest rates would stay low despite huge budget deficits; that inflation would remain subdued despite huge bond purchases by the Fed; that sharp cuts in government spending, far from unleashing a confidence-driven boom in private spending, would cause private spending to fall further. But all these predictions came true.

The point is that it’s wrong to claim, as many do, that policy failed because economic theory didn’t provide the guidance policy makers needed. In reality, theory provided excellent guidance, if only policy makers had been willing to listen. Unfortunately, they weren’t.