You have given me a mechanic that accounts for a minor discrepancy in behavioral patterns, not a large one. No evidence of women not getting involved in tech b

You have given me a mechanic that accounts for a minor discrepancy in behavioral patterns, not a large one. No evidence of women not getting involved in tech because they felt inadequate as women? This is something that people have been screaming about for a while. A lot, if not the majority, of women are brought up surrounded by the assumption that they aren't good at math, or that they won't be doing much of anything but be housewives, as a lot of men are brought up surrounded by the assumption that they will be providers, and will chase tail. These are, obviously, simplifications. A lifetime of being discouraged from "not your gender" activities is going to make an individual less likely to do said activities, regardless of their natural propensity for said activities. The 7 women who did get in would be women who either realized that they were capable of it, decided they didn't care about the social pressures, or weren't surrounded by the social pressures to begin with. They could also be females that are closer to the average male in the ways that count for joining a startup. There's a lot of possibilities. I dont think that Y Combinator has been discriminating against women. I do think that the cultural perception of gender roles in the US makes it less likely for women who would otherwise be applying to even get to the point where they'd have something to put on an application. Less than a hundred years ago, women didn't have the right to vote. There's still a large percentage of the population that thinks that the place for a woman is in the kitchen, making babies. Do you really think that theses attitudes have no effect on the amount of women doing things like joining startups? You and I may not have attitudes like that, but if you think that those attitudes are rare, you are mistaken. The same thing happens with men with different activities. The studies you showed, while they did show differences between males and females with regards to risk-taking, did not show a huge difference between males and females. If we were talking about 11 female founders out of 30, it would be one thing. That is not the case. There is a large difference, and I find the "well men are more prone to risk taking" argument quite unconvincing when the data shows that men are more prone to taking risks -- but not nearly to the same degree as the discrepancy. Furthermore, many of the social risk-taking activities studied may not be motivated out of anything that is intrinsic to being a man or a woman. A man may take risks as a form of mating dance. A man may also take risks because "that's what a man does". This is not a simple issue, and I doubt it can be reduced to purely biological differences, other than in the very literal level that all differences between individuals can.