[daleharvey]

Most of the recent things I have read have been a summation of this study - http://sf.oxfordjournals.org/content/early/2013/08/21/sf.sot... In particular I think I noticed http://journalistsresource.org/studies/society/gender-societ... Which mainly discusses how many women leave STEM compared to over fields and to do what.

However if I didnt find any emperical studies to backup my anecdote I wouldnt really care, unless I have some reason to believe everyone I talk to is a habitual liar I will carry on considering it a real and upsetting problem. Problems are still problems and can even be worked towards without having an scientifically rigorous process applied to their definition.

[belorn]

Neither of those studies shows that women leaves STEM because of an "hostile environment".

Study1:

  What does emerge is that investments and job rewards that generally stimulate field
  commitment, such as advanced training and high job satisfaction, fail to build
  commitment among women in STEM.

The second study is more interesting, but is only speculative (i.e. Not scientific).

  “We suspect that the retention deficit in STEM may be due to the team organization
  of scientific work combined with the attitudes and expectations of co-workers and
  supervisors who hold more traditional beliefs about the competencies of women in
  these rapidly changing fields,”

When a researcher says that they "suspect", it really does mean what the word says. Its a opinion without study. A study can produce findings, and findings are what the last linked research article (in the research) show.

  A related 2012 study published in Sociology, “The Dimensions of Occupational Gender
  Segregation in Industrial Countries,” examines why some jobs may be filled more by
  men or women, be it by choice, obligation or exclusion. Among the findings are that
  women tend to outperform men in the general desirability of occupations

So neither is a empirical studies to backup your anecdote. The findings however where an interesting read, and I hope similar studies are made on the "suspected" and "suggested" theories.