I just came across the blog below, which I wrote over a year ago, and for some reason failed to post.  The first part reads so sadly in the light of what eventually happened - though I doubt even the perspicacious Dejevsky foresaw how her prediction would be fulfilled....   Readers may know that the fifth 'PP' factor is positive choice:  women actively choosing not to go on up the career ladder, even though they (probably/possibly) could.  By 'positive' I mean that the choice is, to any reasonable eye, not constrained, e.g. by grumpy partner's unwillingness to do more childcare, but is the product of 'free will'.  I argue that this…