Here are the first two on Google. I'm sure you can find more http://advance.cornell.edu/documents/ImpactofGender.pdf http://advance.cornell.edu/documents/Impac

Here are the first two on Google. I'm sure you can find more http://advance.cornell.edu/documents/ImpactofGender.pdf http://advance.cornell.edu/documents/ImpactofGender.pdf http://www.pnas.org/content/109/41/16474.abstract http://www.pnas.org/content/109/41/16474.abstract