A study by Robert Provine at the University of Maryland showed that women laugh more than men, and that both men & women laugh less at women than they do to men.
The new research says:
A study in Psychonomic Bulletin and Review finds that men might have a tiny edge over women in producing humor but the gap is too small to account for the stereotype. Scientists had 16 male and 16 female subjects write funny captions for 20 New Yorker magazine cartoons, men's captions rated higher on average than women's captions. But only by a mere 0.11 points out of perfect score of 5.0.