Studies by scientists find men prefer larger women during hard economic times. They even went as far back as the Depression to come to this conclusion. Here's an interesting quote I pulled.
"During challenging economic times, men would gravitate toward women they intuited were mature, independent and protective; when times are flush, men wouldnt prioritize these same values, and instead seek a woman who appeared to be less emotionally strong, less physically strong,
The article:
http://www.thedailybeast.com/blogs-and-stories/2009-03-13/hot-and-heavy/
"During challenging economic times, men would gravitate toward women they intuited were mature, independent and protective; when times are flush, men wouldnt prioritize these same values, and instead seek a woman who appeared to be less emotionally strong, less physically strong,
The article:
http://www.thedailybeast.com/blogs-and-stories/2009-03-13/hot-and-heavy/