Interesting research reported here, Daughters and Left-Wing Voting , commented on here Having Daughters Rather Than Sons Makes You More Liberal
I have had time only for a quick skim through, but cannot spot any comparison between men who have only daughters & those who have only sons, & those with a mixed family, which I think would be even more interesting. I am not very good at reading such complex documents on screen, but I will give it a go (I do not feel like paying for a print out of 45 pages at 15p a page – there is a credit crunch going on, you know)