New York ? The United States has not endured a deep and prolonged recession in more than a quarter century – enough time for many Americans to forget what one feels like.

But unlike the last two relatively short recessions, this one could be much longer and more severe, potentially bringing with it anxiety and job losses not seen in many years.

“In thinking about recessions, people will naturally think back to the last couple” in the early 1990s and in 2001, said Paul Ashworth, senior U.S. economist at Capital Economics in Toronto. “What they should be looking back at is further.”

That requires dredging up memories of the economic slides in the 1970s, when an Arab oil embargo starved the nation of energy, and the early 1980s, when unemployment and inflation soared.

The last recession – coinciding with the collapse of the tech stock bubble and the terrorist attacks of 2001 – lasted just eight months. It was known more for the slow “jobless” recovery that followed than for the depth of the downturn.

Many economists agree that the nation won’t be so fortunate this time.

“I don’t think we can escape damage to the real economy,” former Federal Reserve Chairman Paul Volcker said this week in Singapore. “I think we almost inevitably face a considerable recession.”

The Fed’s current chairman, Ben Bernanke, delivered a more measured, but similarly grave assessment to economists, saying the recent financial turmoil “may well lengthen the period of weak economic performance and further increase the risks to growth.”

The signs of stress are starting to show: The U.S. has lost 760,000 jobs since late last year, and retail sales in September plunged 1.2 percent, the largest drop in three years.