One oft-cited reason why more female executives don’t advance to top management jobs is their lack of access to informal organizational and industry networks. Some people blame unconscious bias: High-ranking men connect more easily with other men. Others cite professional and personal obligations, from office housekeeping to child-rearing, that disproportionately fall to women, leaving them less time to develop professional relationships.But some female leaders do establish strong networks—and they win greater influence and more-senior positions as a result. What are they doing differently?A new study sheds light on their strategies. “I was talking with many women about how to improve their networks, the challenges they face, and what they and their organizations could do better, and I realized that all the studies on the issue were pretty old and narrow,” explains Inga Ca
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