Women have made huge strides in the job market since President Kennedy signed the Equal Pay Act in 1963. Yet almost half a century after it became illegal to pay women less than men for the same job, the weekly wage of a typical woman who works full time is almost 18 percent less than that of the typical working man.

For more: http://www.nytimes.com/2012/06/13/business/economy/motherhood-still-a-cause-of-pay-inequality.html?src=rechp