The gender gap is actually smallest in retirement preparedness, which requires such skills as strategic planning, short-term and long-range forecasting, and analysis of multiple variables.

FORBES: 3 Reasons Why Men Might be Victims of the Gender Gap in Financial Literacy

The International Institute for Applied Systems Analysis in Austria studies the timing of demographic milestones and recognizes the inscrutable variables.

FORBES: Pro-Planet Is Pro-Choice

Nevertheless, due primarily to the negative impressions many people have about so-called "trailer parks, " the value of a manufactured home is less than a third of a comparable site-built home, even when variables such as neighborhood, structural characteristics and geography are controlled, according to an analysis published in the Journal of Real Estate Research.

WSJ: 'Luxurious' Mobile Homes?