Interesting use of cell phone data. The studies conclusions are controversial: that women’s friendships drive the process of finding a mate and supporting the next generation, and that women have intense one-on-one friendships whereas men have a tendency towards multiple friendships.
The contrary view:
“In their reproductive prime, both men and women call the opposite sex much more than they do later in life,” Hruschka says. Even presumed mother–daughter patterns are weaker than he expected. The data suggest that both men and women split their time between calling their children and their spouses. “These differences seem quite small relative to reigning stereotypes about how frequently women communicate with children.”