As part of the college search for my two oldest kids, we put together a spreadsheet in Excel that listed data for all of the schools they were interested in. One of the columns was for sex ratio, and like all of the data in the spreadsheet, the ratios were color coded: green for the ideal value (sex ratios between 50/50 and 55/45), yellow for less desirable values (between 55/45 ad 60/40) and red for values that we had concerns about (60/40 or worse). Since most of the schools on the lists (including the ones they wound up attending) were in the green category, neither kid said much about sex ratios during the application process, but from the few comments they did make I suspect it would have been a tie breaker if the choice had come down to a green school and a red one. And believe at least one school was dropped from the list entirely because of a 70/30 ratio.