STUDENT SHARE DIFFERENCE - AN APPROACH FOR UNDERSTANDING INEQUALITY WITHIN A STATE SYSTEM

Oct 15, 2026

Uploaded by Fahsai

Student Share Difference (SSD) examines how institutional inequality within a state shapes students’ educational experiences. The report uses federal data to construct a hierarchical, relative metric that compares an institution to its public peers within the same state, accounting for context in which in-state tuition constrains student choice. SSD is then explored descriptively at institutional and state levels and assessed using regression methods for associations with retention and completion outcomes, with results suggesting potential positive contributions at some institution types.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages41

Reading Time1 h 43 min

AccessFree to download

Introduction

Background

Descriptive analysis of SSD

Regression analysis of student success outcomes

Implications for policymakers and further research

STUDENT SHARE DIFFERENCE: AN APPROACH FOR UNDERSTANDING INEQUALITY WITHIN A STATE SYSTEM July 2025 BARRETT J. TAYLOR BRENDAN CANTWELL The authors are grateful to Rachel Burns, Kelsey Kunkle and Dustin Weeden of SHEEO, who graciously provided feedback at various stages of development and shared notes on their own efforts to reconcile IPEDS and SHEF data. Introduction Funding for public four-year colleges and universities is variable across and within states. Some states provide relatively generous direct support for public institutions, while others provide substantially less. Similarly, direct support also varies within states, often based on history, recognition of different missions, or outcomes-based funding formulas. Educational costs also vary within states. Some intuitions and institutional types spend more on education on a per student basis than others, though spending tends to be tightly linked with available revenue. Variable state support and variable perstudent spending mean that student tuition covers a higher share of educational costs at some public institutions than at others. Even within the same state, students may be responsible for a higher or lower share of educational expenses depending on where they attend. Scholars and policy analysts have long focused their attention on questions related to funding for higher education. Considerations include questions about the relationship between educational spending and student success and efforts to determine overall levels of funding adequacy. In this report, we build on those conversations by drawing attention to the relationship between variation in the share of educational expenditures that are covered by tuition, student retention and completion, and institutional inequality, which we understand both financially (meaning differences in levels and sources of income) and socially (meaning differences in status, as measured by admission selectivity) (Taylor & Cantwell, 2019) . To do this, we use federal data to develop a novel measure that we term Student Share Difference, or SSD. We find that SSD is a useful tool for assessing institutional inequality within a state that directly impacts students. As such, the measure of intrinsically interesting for scholars focused on higher education policy, finance, and outcomes. Further, SSD may be useful for policymakers. SSD compares an institution to its public peers within a state rather than to past levels of funding or institutions in other states. This changes the kinds of implications we can draw from our analyses. Rather than recommending that states return to past levels of funding, our analyses suggest ways in which states could spread existing resources and obligations throughout a public higher education system. Reducing institutional financial inequality (as measured by SSD) may help some states to improve student success by identifying the kinds of institutions at which additional funds are most likely to produce results. Finally, while we understand that SSD is a calculated measure whose interpretation is not always intuitive, we also think it can be useful for students and families surveying the higher education landscape. The utility of SSD derives from the fact that it is hierarchical (positive is “better”) and relative to other public baccalaureate-granting institutions in a state. For prospective students, this gives SSD two analytic advantages over other approaches to studying state funding. First, studying change overtime in absolute levels of funding has no practical implication for students, who cannot enroll today in the institutions of the past. Second, studying variation at the institutional level without attention to state context ignores the fact that in-state tuition effectively constrains the choice sets of most students. SSD accounts for both problems because it compares institutions to one another at a given moment in time (not across time) and situates those comparisons

FAQs

What is Student Share Difference (SSD) and how is it measured?

SSD is a novel metric built from federal data that compares an institution to its public peers within the same state. It is designed to be hierarchical, where positive values indicate relatively better relative conditions.

Why does the report emphasize relative comparisons within a state rather than across time or across states?

The report argues that absolute funding changes over time may not directly affect students who enroll today, and that institutional comparisons without state context ignore how in-state tuition constrains student choice sets.

How does SSD relate to student success outcomes in the report?

The report tests whether SSD is associated with student success measures, including retention and completion rates. It finds suggestive but not conclusive evidence that SSD may contribute positively to student outcomes at some types of institutions.

Oct 15, 2026

Uploaded by Fahsai