Business author Julian Guthrie on the biggest difference between 'alpha' men and women

If you've been out and about in Silicon Valley in the last month or so, chances are you've heard of "Alpha Girls," a new book written by journalist Julian Guthrie about four people who've made a big impact on the world of startup investing. The book recognizes them -- Theresia Gouw, MJ Elmore, Sonja Hoel Perkins, and Magdalena Yesil -- because they are interesting individuals, each with very different upbringings and skill sets and areas of expertise. Elmore signed on with IVP in 1982, becoming a general partner by age 28.