Xenia,
Just out of interest, is there data on the educational outcomes for children whose mothers are SAHM in the pre-school years (or even in the first couple of years of school) vs those who remain at home throughout their child's time at school?
It's just that I know very many of my - Cambridge - contemporaries, very intelligent women with highly successful children, who stayed at home until their children started school, then returned to work either gradually or fully at that point. As I say, all the children have been extremely successful - more so than those from other similar families where the mother has worked throughout. I believe that the cohort of women who stay at home during the early years is very different - in nature, age, education, previous experience etc - from the cohort who stay at home long term throughout their child's school life.
Link to any statistical reports would be very useful, as obviously I am talking about a very specific group of people I know, rather than looking at a statistically significant sample...
(Oh, and of course I mean 'actual success' in the children, not 'school attended giving likelihood of success' - I'm talking A-levels, universities attended, degree classes obtained etc)