I've seen a number of articles about college educated women having trouble finding enough college educated men to meet the demand. Also consider the factor age

I've seen a number of articles about college educated women having trouble finding enough college educated men to meet the demand. Also consider the factor age can play in this, given that people tend to gain wealth throughout most of their life. If women married men who were a bit older than them, you would see a marry up effect and you would also have more widows at older age since their older husband has passed.