Education Spending and Outcomes

In 2016, the Connecticut Superior Court held that the state failed to uphold its constitutional duty to provide adequate education to children in certain school districts.[i] The court’s decision was neither unique nor unexpected. Over the past decade, dozens of court decisions have rendered “inadequate provision of education” verdicts in states across America. However, unlike the Connecticut case, most of the decisions have focused on requiring increased education funding as a means to improving education outcomes. In Connecticut, education spending per student across the state is high, even in districts with high rates of poverty.

The combination of quality teachers instructing engaged students is one way to yield desirable academic outcomes. But simply providing additional school funding does not magically create better teachers or more serious students. For example, Washington, D.C. spends more than twice the national average per student[ii] and yet ranks as one of the worst performing school districts in the country. Connecticut ranks fifth highest in expenditures per student nationally as of 2014;[iii] even the schools which rank near the bottom in per-student spending compared with other Connecticut schools spend approximately 20 percent higher than the national average.

In Table 1 displays the correlation between high school graduation rates and per-pupil expenditures, using the Connecticut Department of Education “EduSight” data. The logarithmic relationship between spending and outcomes is reminiscent of other studies.[iv] For instance, Emiliana Vegas and Chelsea Coffin’s study of per-student expenditures and PISA math scores found, “when education systems spend above $8,000, the association between student learning and per-student spending is no longer statistically significant.”[v] The findings of Vegas and Coffin are visualized in Table 2, below and right, for comparison. In 2016, the American Legislative Exchange Council (ALEC) issued a “State Factor, The Pernicious Myth of the Underfunded American School System,” which compares education funding and outcomes over time and finds a similar lack of correlation.


Another factor which correlates with student outcomes is teacher quality. However, the challenges involved in quantifying teachers’ skills make it unwise to simply attribute the dismal student outcomes alongside elevated expenditures to unsatisfactory teacher performance. But experience does not support the theory that advanced degrees and certifications of teaching faculty necessarily produce improved student outcomes.[vi] Compounding the problem, the generation of new teacher performance metrics faces significant political opposition.[vii]

In addition to school funding and teacher quality, the prevalence of poverty, violence and family cohesion tend to be highly correlated with graduation rates[viii][ix][x]. For example, see the Table 3 and Table 4 display of the correlation between graduation rates and poverty and robberies, respectively. As expected, there is a general relationship between the trauma of poverty, violence, and high school graduation rates.

Using a series of multivariate regression models (see appendix), the correlations between high school graduation rates and poverty, crime, urbanicity, and student expenditure becomes clear. For every $10,000 of per pupil expenditure, graduation rates increased a mere 0.03 percent when controlling for other factors. On the other hand, every 1 percent increase in household poverty correlated with a 0.78 percent decline in graduation rates. In other words, household poverty is a far greater predictor of education outcomes than per student expenditures. While both are statistically significant, the relationship between poverty and graduation rates is practically significant.

There is a caveat to the practically insignificant correlation between per pupil expenditure and student outcomes. Per pupil expenditure does not control for the fact that non-teaching staff, administration, has grown far faster than education expenses. Since 1970, for every new dollar spent on a teacher, two dollars were spent on administration, see Table 6. Thus, higher spending per pupil may not have a one-to-one correlation with spending on the classroom.

[xi] Furthermore, our model assumes that teacher quality in Connecticut is high and homogenous. While teacher quality is difficult to quantify, competition aggregates information from each person in the market and consumption tends to gravitate toward the higher product good and assuming equal cost. Charter schools, such as the Success Academy in New York City has had success in spite of high rates of poverty and equal costs.[xii] This shows the charter system has likely found a way to improve teacher quality, through selection or training, even though it is difficult to quantify.

The battle over the Equalized Cost Sharing formula, a major sticking point in the ongoing budget battle in Connecticut,[xiii] is focused on the wrong solution. The solution is an expansion of the economic opportunities that can help eradicate the one factor that is most closely linked to dismal educational outcomes: pervasive poverty. Simply funneling more dollars to schools avoids the challenging work of lifting Connecticut’s economic outlook out of the bottom five.[xiv]



Regression models:

Dependent Variable: Graduation Rate Model 1 Model 2 Model 3
Robberies per Square Mile -0.025 **


-0.011 *


Household Poverty Rate -0.855 ***




Population Density -0.00001 ***


-0.00001 **




Expenditure per Pupil (in thousands) 0.002




Constant .903 *** .917 *** .910 ***
Adjusted R2 0.512 0.626 0.632

*(N = 126 school districts, districts which did not report graduation rates were omitted)


In Depth: Education

An excellent education has long been recognized as key to the American Dream. Unfortunately, the current monopolistic and expensive K-12 education system is failing our students, leaving them unprepared for college, careers, or life. Similarly, our higher education system is leaving students with higher debt burdens and fewer career guarantees…

+ Education In Depth