In earlier work, the authors found that only 10% of the students at 28 of the nation's most selective private colleges and universities came from families in the bottom 40% of the US family income distribution and that there is a larger share of low-income high-ability students in the national population than in the student bodies of these selective private schools. Using SAT and ACT data, this paper finds that inadequate attention to geography and the incidence of ACT tests in their search and recruiting activities has contributed to a bias against low-income students at these schools. (Contains 1 figure and 4 tables.)