In married working couples, the more money a woman earns, the less housework she will do, regardless of how much money her spouse makes, says Sanjiv Gupta, a sociologist at the University of Massachusetts Amherst. That finding, based on a study of women who work full-time, may not seem astounding, but it is breaking new ground for researchers examining the sometimes mysterious relationship between money and domestic work and spousal relationships. The study was recently published in the Journal of Marriage and Family.