His &quot;it&#x27;s not the pipeline&quot; argument rests on 30% of STEM degrees going to women, but that is for all STEM degrees. In the degrees most relevant to Silicon Valley, engineering and computer science, it is 16%. The average is pulled up to 30% by much higher concentrations of women in physical sciences (40%), math and statistics (42%), and biology (58%).<p>16% of the engineering&#x2F;CS degrees going to women lines up very nicely with the 15% he cites for the number of tech jobs in the Bay Area being held by women.<p>Many of the comparisons of Silicon Valley to national averages are comparing very different types of companies. For example, the comparison of executives is comparing to the S&amp;P 100. I see no reason to expect that, say, a pharmaceutical company absent discrimination would be expected to have the same percentage of women executives as a computer software company absent discrimination. As his link on STEM degrees shows, women make up a considerably higher percentage of the degrees that would be of interest to a pharmaceutical company.