Justin Wolfers, The New York Times, March 2, 2015

Fewer large companies are run by women than by men named John, a sure indicator that the glass ceiling remains firmly in place in corporate America. Among chief executives of S.&P. 1500 firms, for each woman, there are four men named John, Robert, William or James. We’re calling this ratio the Glass Ceiling Index, and an index value above one means that Jims, Bobs, Jacks and Bills — combined — outnumber the total number of women, including every women’s name, from Abby to Zara. […read more]