Andreas Kolbe writes: Wikipedia is well known to have a very large gender imbalance, with survey-based estimates of women contributors ranging from 8.5% to around 16%. This is a more extreme gender imbalance than even that of Reddit, the most male-dominated major social media platform, and it has a palpable effect on Wikipedia content. Moreover, Wikipedia editor survey data indicate that only 1 in 50 respondents is a mother – a good proportion of female contributors are in fact minors, with women in their twenties less likely to contribute to Wikipedia. Wikimedia Foundation efforts to address this "gender gap" have so far remained fruitless. Wikipedia’s demographic pattern stands in marked contrast to female-dominated social media sites like Facebook and Pinterest, where women aged 18 to 34 are particularly strongly represented. It indicates that it isn’t lack of time or family commitments that keep women from contributing to Wikipedia – women simply find other sites more attractive. Wikipedia’s user interface and its culture of anonymity may be among the factors leading women to spend their online time elsewhere.