Some if it ties in with this:
http://www.medicalnewstoday.com/articles/105013.php at least regarding sex at conception. I am not entirely sure about whether we really have hard direct data regarding sex at conception but that's one possibility regarding that data. On the other hand, it's possible that there are biological differences between sperm carrying X and Y chromosomes and that these might be selected for one way or another.
However, trans-historically (closer to my field of expertise) it is generally true that men take on riskier endeavors than women do, and that women follow as areas develop. Frontiers generally tend to be nearly exclusively male (at one point the Wild West had a gender ratio of 50 men per woman, and this is not isolated. Consider the early classical practice of having the men march off in search of fortune, for example.
The thing to keep in mind here is that women have a narrower window of opportunity to start a family than men do. If you are 40 and male, and you are not married, you could still get married to a younger woman and have kids, but if you are 40 and female, you are less likely to be able to have kids. Therefore men can generally better afford to move into immature markets and riskier endeavors than women can.