But does racism affect the admissions rate: yes it does. Racism and poverty.
Wouldn't academic ability also affect the admissions rate? There is about a 1 standard deviation difference in group scores.
Gottfredson, L. S. (2005). Implications of cognitive differences for schooling within diverse societies. Pages 517-554 in C. L. Frisby & C. R. Reynolds (Eds.), Comprehensive Handbook of Multicultural School Psychology. New York: Wiley.
www.udel.edu/educ/gottfredson/reprints/2005cognitivediversity.pdf