Abstract
For decades, educators and policy makers have decried low graduation rates at US colleges, advocating policies and making investments to improve graduation. We analyze a decade of Integrated Postsecondary Education Data System (IPEDS) data for four-year colleges to investigate how much institutions have improved their graduation rates from 2008 through 2018, once controlling for institutional and student-body characteristics. We find substantial improvement to graduation rates at public colleges, modest improvement at private not-for-profits, and a decline in graduation at the for-profit sector. We then investigate whether improvements to graduate rates are associated with variation in student-body composition, selectivity, and institutional expenditures, using pooled cross-sectional, Prais–Winsten, and college fixed-effect models. We find that most between-college variation in graduation rates over time reflects variation in the composition of a college’s student body and in instructional expenditures. Our Bending the Curve metric utilizes the cross-sectional models to calculate predicted graduation rates for each college and determines how much they exceeded or failed to meet expectations. Unadjusted graduation measures, such as IPEDS’ rates that fail to adjust for these compositional factors, are poor indicators of institutional effectiveness and can mislead stakeholders who use them as an indicator of college performance.
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Notes
Roughly 13% of the institutions in our sample do not require test scores. Additionally, there is a high correlation between requiring test scores and the performance in these tests with our institutional selectivity variable. As such, to not lose information particularly on lower ranked institutions and following recent research we chose to include only institutional selectivity in the final models.
We also performed tests using 6-year lagged predictors of graduation rates. For example, 2018 graduation rates were predicted using 2013 predictors. Our models remained very similar and our meaningful conclusions did not change. As such, we opted to use contemporaneous predictors that would allow us to increase our long-term analysis.
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This report is based on research funded in part by the Bill & Melinda Gates Foundation (Grant # OPP1159855) and Ascendium Education Solutions, formerly the Great Lakes Higher Education Guaranty Corporation (Grant # G-201704-15499). The findings and conclusions contained within are those of the authors and do not necessarily reflect positions or policies of the Bill & Melinda Gates Foundation, or Ascendium Education Solutions.
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de Castro Galvao, J., Tucker, F. & Attewell, P. Bending the Curve: Institutional Factors Associated with Graduation Rates. High Educ Policy (2023). https://doi.org/10.1057/s41307-023-00304-5
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DOI: https://doi.org/10.1057/s41307-023-00304-5