This study considers whether formally segmenting 4-year institutions by admissions selectivity affects the admission of transfer students. It develops a new measure, the student admission ratio, to compare the admission of transfer students in formally and highly segmented systems, informally and less segmented systems, and in formally unified systems. The study finds that the segmentation of systems by admissions selectivity does not adversely affect transfer admissions. The study concludes by positing that the formal structure of a system is not so important for student transfer as the processes for implementing transfer policy, and it considers the implications of this for practice. (Contains 10 tables.)