A very broad overview after US Congressional hearings:
A new study of 40 peace processes found a strong correlation between the involvement of women’s groups in political negotiations and successful negotiation and implementation outcomes.

(In policing) A growing body of evidence supports the notion that increasing the number of women in police forces could significantly reduce police violence and excessive use of force, as well as foster broader social and political stability.
Link:http://www.pbs.org/newshour/rundown/...nd-save-lives/