This is the main conclusion of diverse studies all over the globe and a reason why in some OECD countries single sex education present as answer to close the gender gap."Even if the gender gap in overall educational attainment is narrowing, it remains wide when it comes to the field of study. Women are still much under-represented in science, technology, engineering and mathematics (STEM). "Even though more women are completing STEM degrees (particularly in biology and agriculture), they still account for a very small share of student in computing and engineering – subjects in great demand on the labour market in OECD countries and other regions"
The problem for Jane Wakefield (technology reporter of the UK BBC news) is that "The issue goes back to schools, where girls are seriously underrepresented in all Stem subjects - science, technology, engineering and maths. The reasons why have long been debated. Lack of role models, the perception of geeks as rather socially challenged and a sense that Stem subjects lack creativity - often a huge motivator for girls".
BBC news UK: Will the next Zuckerberg be female?
OECD Education: http://www.oecd.org/gender/data/indicatorsofgenderequalityineducation.htm