Go wild on google.scholar.com and you will find plenty to read. :) Useful terms might be “women (duh)”, “gender”, “impact”, “governance”, “politics”, “environment”, “peace” etc Also private companies reports more long-term benefits with a majority of women board members so you might want to look for that as well
…Yes, individuals are different from each other and the aggregated sum shows a tendency for women being better at governance than men.
This obviously doesn’t mean that there are no men that are good at governance or women who are worse as you point out.