Central bankers have been asking whether they should have reacted faster to rising inflation last year — and are learning from the recent past.Some Federal Reserve officials have begun to acknowledge that they were too slow to respond to rapid inflation last year, a delay that is forcing them to constrain the economy more abruptly now — and one that could hold lessons for the policy path ahead.Inflation began to accelerate last spring, but Fed policymakers and most private-sector forecasters initially thought price gains would quickly fade. It became clear in early fall that fast inflation was proving to be more lasting — but the Fed pivoted toward rapidly removing policy support only in late November and did not raise rates until March.Several current and former Fed officials have suggested in recent days that, in hindsight, the central bank should have reacted more quickly and forcefully last fall, but that both profound uncertainty about the future and the Fed’s approach to setting policy slowed it down.Officials had spent years dealing with tepid inflation, which made some hesitant to believe that rapidly rising prices would last. Even as they became more concerned, it took the Fed’s large group of policymakers time to come to an agreement on how to respond. Another complicating factor was that the Fed had made clear promises to markets about how it would remove support for the economy, which made adjusting quickly more difficult.“It was a complicated situation with little precedent — people make mistakes,” Randal K. Quarles, who was the Fed’s vice chair for supervision in 2021, said at a conference last week.Mr. Quarles, who left the Fed at the end of the year, argued that it should have begun to pull back support aggressively after September. He added, however, that the rate increases that central bankers were now making could still fix the situation.Even so, the delay could come with consequences. By the time the Fed completely stopped buying bonds and began raising rates in March, prices were rising 8.5 percent from a year earlier, the fastest rate since 1981. Consumer price increases are expected to remain rapid when fresh data are released Wednesday.Understand Inflation and How It Impacts YouInflation 101: What is inflation, why is it up and whom does it hurt? Our guide explains it all.Inflation Calculator: How you experience inflation can vary greatly depending on your spending habits. Answer these seven questions to estimate your personal inflation rate.Interest Rates: As it seeks to curb inflation, the Federal Reserve began raising interest rates for the first time since 2018. Here is what the increases mean for consumers.State Intervention: As inflation stays high, lawmakers across the country are turning to tax cuts to ease the pain, but the measures could make things worse. How Americans Feel: We asked 2,200 people where they’ve noticed inflation. Many mentioned basic necessities, like food and gas.And as high prices have lingered, inflation expectations have been creeping up, threatening to change household and business behavior in ways that perpetuate the problem.Because inflation is eating away at paychecks and making it more difficult for families to afford groceries and cars, it has emerged as a major political issue for President Biden, whose approval ratings have fallen over concerns about his handling of the economy. During remarks at the White House on Tuesday, Mr. Biden called inflation his “top domestic priority” and said his administration was taking steps to contain it. He also sought to push back on Republicans, who have spent months blaming him for stoking inflation, saying their policy ideas were “extreme” and would hurt working families.“I want every American to know that I’m taking inflation very seriously,” Mr. Biden said, noting that the Fed has the “primary role” in trying to tame price increases.The Fed is now raising rates quickly to wrestle the situation back under control. Officials lifted borrowing costs half a percentage point this month, their biggest increase since 2000, while broadcasting that two more large adjustments could be coming. They are also going to start shrinking their $9 trillion balance sheet of bond holdings next month.If the Fed continues to rapidly adjust policy this year as it tries to catch up, policymakers risk slamming the brakes on a speeding economy. Such hard stops can hurt, pushing up unemployment and possibly tipping off a recession. Officials typically prefer to apply their policy brakes gradually, increasing the chances that the economy can slow down painlessly.Still, several Fed officials pointed out that it was easier to say what the Fed should have done in 2021 after the fact — that in the moment, it was difficult to know price increases would last. Inflation initially came mainly from a few big products that were in short supply amid supply chain snarls, like semiconductors and cars. Only later in the year did it become obvious that price pressures were broadening to food, rent and other areas.“I try to give some grace, and say: In a very uncertain time, with an unprecedented setting, with no real models to guide us, people are going to do the best they can,” Raphael Bostic, the president of the Federal Reserve Bank of Atlanta, said in an interview Monday. Mr. Bostic was an early voice suggesting that the Fed should stop buying bonds and think about raising interest rates.Officials have said it was the acceleration in inflation data in September, followed by rising employment costs, that convinced them that price gains might last and that the central bank needed to act decisively. The Fed chair, Jerome H. Powell, pivoted on policy in late November as those data points added up.“It was a complicated situation with little precedent — people make mistakes,” said Randal K. Quarles, who was the Fed’s vice chair for supervision in 2021.Erin Scott/ReutersWhile Mr. Quarles argued that the Fed should have responded as the September data came in, he suggested that there had been a complicating factor: Mr. Powell was waiting to see if he would be reappointed by the Biden administration, which did not announce its decision to renominate him until mid-November.Mr. Quarles, on a “Banking With Interest” podcast episode last week, said reacting to the data was “hard to do until there was clarity as to what the leadership going forward of the Fed was going to be.”Inflation F.A.Q.Card 1 of 5What is inflation? More