Economists say they are hopeful the pace will soon pick up further.

“Economic recoveries can be like a snowball rolling down a hill, in that it takes time to get some momentum,” said John Ryding, chief economist at RDQ Economics. “People hesitate until they feel that the recovery’s durable enough, and then they have a tendency to jump in. Maybe we’re finally getting to that jumping-in moment.”

Threats to a more robust recovery remain, of course, including a surge in energy and food prices, with the possibility of disruptions in oil production in the Middle East continuing to weigh on the financial markets. State and local governments are also shedding jobs, which depressed the total for February, as they grapple with budget woes.

But for now, the improvement is notable. The unemployment rate ticked down to 8.9 percent last month, falling below 9 percent for the first time in nearly two years. This rate, which comes from a survey separate from the payroll numbers and is based on the total number of Americans who want to work, has remained stubbornly high the last year. Altogether, 13.7 million people are still out of work and actively looking.

Economists say the unemployment rate could rise temporarily in the next few months, as stronger job growth lures some discouraged workers to look for jobs again. Right now, just 64.2 percent of adults are actively involved in the work force, meaning they are either in a job or actively looking for one. That is the lowest participation rate in 25 years, an indication that many Americans are either staying home, going back to school, raising children or otherwise waiting for better conditions before applying for work.

“It’s a puzzle, a genuine puzzle why that number has been stuck,” a senior economist at Credit Suisse, Jay Feldman, said. “I expect it to recover somewhat in the coming months as the labor market improves and more people become encouraged about their job prospects.”