That dreaded threat: "Just wait until your dad gets home" is different in many American households today, as recognized by a cover on the New Yorker Magazine May 12, 2012, [See left, click on link to access archives of the New Yorker] The statistics are really interesting.
According to Alex Williams, writing for the New York Times, in the last decade the number of men who have left the work force entirely to raise children has more than doubled, to 176,000. His information source is recent United States census data. Williams says that when one includes men who maintain freelance or part-time jobs but serve as the primary caretaker of children under 15 while their wife works, there are around 626,000 acting as the primary caretakers of children. You can access the Census reports here.
Just Wait Until Your Mother Gets Home, Aug. 10, 2012, New York Times, by Alex Williams may be read here.