'Invisible' resource: women for boards

Despite the increased appearance of women on corporate boards in recent years, only 1.8% of the directors of the top 1,300 boards are women. Almost without exception, these women have been highly "visible" for their achievements in government, education, and nonprofit circles. But there are hundreds of other high achievers who are not so visible. The problem for chairmen and nominating committees is two-fold: (1) identifying and selecting the best of this "unknown" but talented pool of candidates and (2) defining and communicating their expectations from women.