Hmmm we are constantly told that women only make up a small minority of STEM field positions. How is it then that this small minority is going to get 38% of the research chairs?
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If only 10% of advanced research positions in physics are occupied by women then giving them 38% of the Canada Research Chairs means some of the very brightest people are not getting the chairs and some of the chairs are going to people who don't deserve them.. 
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I wonder how top male researchers will respond to this country giving them the brush-off? Perhaps some will go to a country that would appreciate my talents and not judge me on my genitals.