This study compares graduation rates, one of only a few systemwide accountability measures currently available, among four-year colleges and universities that are similar with respect to selectivity and low-income enrollment. Further, the study identifies institutions that serve large low-income undergraduate populations and compares those with relatively high graduation rates with other low-income serving institutions. System-wide comparison of six-year 2004 graduation rates at four-year colleges and universities among groups of institutions that share common characteristics related to students’ academic preparation and the size of low-income enrollment (using the proportion of federal grant aid recipients among the freshmen included in the graduation rate cohorts).