But now, a different explanation is turning up in government data, in the research of a few economists and in a Congressional study, to be released Tuesday, that follows the women’s story through the end of 2007.

After moving into virtually every occupation, women are being afflicted on a large scale by the same troubles as men: downturns, layoffs, outsourcing, stagnant wages or the discouraging prospect of an outright pay cut. And they are responding as men have, by dropping out or disappearing for a while.

“When we saw women starting to drop out in the early part of this decade, we thought it was the motherhood movement, women staying home to raise their kids,” Heather Boushey, a senior economist at the Joint Economic Committee of Congress, which did the Congressional study, said in an interview. “We did not think it was the economy, but when we looked into it, we realized that it was.”

Hard times in manufacturing certainly sidelined Tootie Samson of Baxter, Iowa. Nine months after she lost her job on a factory assembly line, Ms. Samson, 48, is still not working. She could be. Jobs that pay $8 or $9 an hour are easy enough to land, she says. But like the men with whom she worked at the Maytag washing machine factory, now closed, near her home, she resists going back to work at less than half her old wage.

Ms. Samson knows she will have to get another job at some point. She and her husband still have a teenage daughter to put through college, and his income as a truck driver is not enough. So Ms. Samson, now receiving unemployment benefits, is going to college full time  leaving the work force for more than two years  hoping that a bachelor’s degree will enable her to earn at least her old wage of $20 an hour.