Research points to a substantial gender gap in the way women and men approach running for [political] office. Women have different reasons for running, are more reluctant to do so and, because there are so few of them in politics, are acutely aware of the scrutiny they draw — all of which seems to lead to differences in the way they handle their jobs once elected.
“The shorthand of it is that women run for office to do something, and men run for office to be somebody,” said Debbie Walsh, director of the Center for American Women and Politics at Rutgers University. “Women run because there is some public issue that they care about, some change they want to make, some issue that is a priority for them, and men tend to run for office because they see this as a career path.” ...
Once elected, women feel pressure to work harder, said Kathryn Pearson, an expert on Congress at the University of Minnesota. Her studies of the House show women introduce more bills, participate more vigorously in key legislative debates and give more of the one-minute speeches that open each daily session. In 2005 and 2006, women averaged 14.9 one-minute speeches; men averaged 6.5.
--Sheryl Gay Stolberg, NYT, on politics as a cause versus a career