Well I know what the survey sample was, and it was kind of interesting, its really the last group of women to go through the most elite womens schools that ever existed (The Seven Sisters, the female version of the Ivy League - Barnard College, Bryn Mawr College, Mount Holyoke College, Radcliffe College, Smith College, Vassar College, and Wellesley College.) The sixties would have a profound effect on these institutions, but BF was dealing mostly with women who went through college post war - but who were not a part of baby boom, they were caught inbetween in a way. Most were too young to have been Rosie the Riveter in the war, and too old to be a part of that huge swell coming on under them. And, they were the daughters of the old line, pre WWII elites in the U.S. at a time when those schools were the female bastion of East Coast industrial wealth. Hardly a random cross sample.