WASHINGTON (AP) – A new national survey says working moms increasingly want full-time jobs outside the home, and tough economic times might be a big reason.

In the Pew Research Center study released today, researchers saw a big spike in the share of working moms who said they’d prefer to work full time; 37 percent said that was their ideal, up from 21 percent in 2007.

The poll comes amid a national debate on women in the workplace ignited by top Facebook executive Sheryl Sandberg, who writes in a new book about the need for women to be more professionally aggressive.

In “Lean In: Women, Work, and the Will to Lead,” Sandberg argues that women have not made true progress in the workplace over the past decade and that they need to raise their hands more and,  “lean in” if they want to land more senior positions in corporate America.

However, the shift toward more full-time work – as reflected in the Pew poll – coincides mostly with the recession. It may have less to do with career ambitions than with financial realities.