Chaney, B., Muraskin, L. D., Cahalan, M. W., & Goodwin, D. (1998). Helping the progress of disadvantaged students in higher education: The federal student support services program. Educational Evaluation and Policy Analysis, 20(3), 197-215.

Student Support Services (SSS) is one of the largest federal TRIO programs designed to help disadvantaged students stay in and complete college. Through a longitudinal study of participants and comparable non participants, we examined the impact of SSS on retention. Data were collected through student questionnaires, institutional and program data, and students’ postsecondary transcripts. We found that SSS had a positive impact for all three measures of retention that were used, but the impact varied depending on which services students used and how much they participated. The results confirm that retention programs should address both academic and social integration on campus.

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Paulsen, M. B., & John, E. P. S. (2002). Social class and college costs: Examining the financial nexus between college choice and persistence. The Journal of Higher Education, 73(2), 189-236.
Cabrera, A. F., Nora, A., & Castaneda, M. B. (1992). The role of finances in the persistence process: A structural model. Research in higher education, 33(5), 571-593.