‘It really disturbs me to say this, but I think I agree with Larry.’ Paul Krugman is with his frenemy Larry Summers on the inflation fight.

As the calendar ticks over to 2023, signalling a new phase in the months-long fight against record inflation, America's two leading left-of-center economists—Paul Krugman and Larry Summers—continue to debate the best way forward. For the past two years (as with much of the last two decades), they haven't agreed on much, but as the Nobel laureate Krugman told Bloomberg TV on Monday, "It really disturbs me to say this, but I think I agree with Larry."

The remarks are surprising in the sense that Krugman has staked out the inflation dove post over the past two years, first insisting it would be "transitory" and later admitting he was wrong, but still usually breaking with Summers' hawkish stance. Krugman has argued that U.S. inflation is cooler than official data suggest, helping give markets hope that the Federal Reserve will stop tightening monetary policy and raising interest rates. Summers, the Harvard professor and former Clinton and Obama administration official, has actually been sounding Krugman-like for a few weeks, warming to the idea that the U.S. might achieve its hoped-for "soft landing." What's clear is that the two long-time acquaintances increasingly agree that the U.S. economy is in a hard-to-understand place right now.

“I’m a little worried that the markets may be getting ahead of themselves,” Krugman told Bloomberg TV on Monday. The Princeton economist and New York Times columnist said that markets and financial writers were now largely in agreement that “inflation is behind us.”

“That makes me nervous, whenever I see people in that much agreement,” he said.

Krugman was also asked about comments made by Summers on Bloomberg TV the previous Friday.

In that interview, Summers suggested the U.S. central bank not reveal its next steps after its interest rate decision on Feb. 1. The Fed needs to “maintain maximum flexibility in an economy where things could go either way,” he said—and should avoid implying that the fight against inflation was over by publicly committing to stopping interest rate hikes.

Summers characterized the U.S. economy as a car, with the Fed in the driver’s seat. “They’re driving the vehicle on a very, very foggy night,” said the economist.

Krugman used the same analogy on Monday when he remarked on his sense of agreement with Summers. “We’re trying to operate the controls on some fairly sensitive machinery, in the dark, wearing mittens.”

He added that he agreed with Summers that the Fed was just as likely to overestimate inflation as underestimate it. “We will get it wrong, one way or the other, and there’s a reasonable chance in either direction,” Krugman said.