MORE EVIDENCE FOR MISMATCH EFFECT IN STEM: There’s a lot of evidence now. For an explanation of the Mismatch Effect in STEM, see Want to Be a Doctor? A Scientist? An Engineer? An Affirmative Action Leg Up May Hurt Your Chances. Note that it’s not just affirmative action that can hurt a student’s chances of getting a STEM degree. Legacy and athletic bumps can hurt too.