Recent research shows that attending graduate school with racially diverse peers leads to higher median starting salaries upon graduation. This large-scale study examined decades of data from business and law schools across the United States. The results were published in the journal Nature.
In 2023, the U.S. Supreme Court struck down race-based affirmative action in college admissions. Justices who opposed this practice argued that the educational benefits of diversity were too abstract for courts to objectively evaluate. They argued that goals such as developing future leaders and breaking stereotypes had no visible connection to university admissions policy.
This legal change led researchers to look for concrete, economic metrics that could quantify the impact of diverse racial representation on student bodies. Devanjan Mitra, a business professor at the University of Connecticut, led the research team. Peter N. Golder of Dartmouth College and Marija Topchy of Travelers Insurance also contributed to the project.
The researchers wanted to test a prominent educational concept known as learning theory. This theory suggests that interacting with different types of people improves cognitive skills, stimulates creativity, and sharpens critical thinking. Students who are exposed to a variety of real-world perspectives are thought to be better prepared for the modern workforce.
Better preparation and higher skills should theoretically lead to better job performance. Higher grades typically result in higher salaries for graduates overall. The researchers wanted to see if the data supported these theoretical benefits.
Other economic models suggest that increased diversity can have exactly the opposite effect. Racial pay disparities are well documented in every industry in the United States. Based on this established discrimination, a graduating class with a higher proportion of minority students could theoretically lower the overall median salary for that particular group.
The research team decided to see which theories held up when applied to real salary data. Their analysis focused on a specific educational setting called a cohort-based program. In these programs, students begin classes at the same time, take nearly the same classes, and graduate together.
This shared schedule creates an environment where students regularly interact and learn from each other both inside and outside of the classroom. Master of Business Administration and Juris Doctor programs are classic examples of this group-oriented educational model. With ongoing peer interaction, these specialized programs are ideal for testing the impact of diversity.
To assess the economic outcomes, the researchers compiled two large datasets spanning several decades. They analyzed 2,964 business school cohorts across 141 institutions over 29 years. They also studied 3,386 law school cohorts across 200 institutions over 21 years.
The data for these analyzes comes from in-depth research conducted by major national publications. Universities regularly submit enrollment metrics and career outcomes that are ranked against peers. These submissions are highly scrutinized by public bodies and competing schools, making the reported numbers highly reliable.
The research team collected data on the percentage of domestic minority students in each freshman class. The survey data categorized minority students as African American, Alaska Native, American Indian, Asian American, Native Hawaiian, Pacific Islander, or Hispanic. The researchers matched this demographic information to the starting salaries reported by the groups upon graduation two to three years later.
The researchers measured the racial composition of the students in two different ways. First, they considered a narrow definition, calculating the proportion of minority students only within a single entering class. Next, we considered a broader definition that included the demographics of students in the classes immediately above and below the focus group.
To isolate the effects of racial expression, the researchers considered multiple external factors. They adjusted their statistical models for standardized test scores, undergraduate grade point averages, and the percentage of female students in each program. We also took into account the prestige, size, and location of the parent university to ensure that grades were not influenced solely by elite schools in urban areas.
The data revealed a positive correlation between racial expression and future income. A higher proportion of minority students in an incoming class consistently predicted higher median starting salaries for its graduates. This pattern applies to both business and law schools.
Both narrow and broad measurements showed the same economic outcomes. When students were exposed to a more diverse group of peers throughout their degree program, their final starting salary tended to be higher. Including overlapping class demographics could have yielded even stronger positive associations with future wages.
This financial support was widely applied to the entire student group. In a theoretical class of 100 students, one additional minority student increased the salary of the entire cohort of business students by about $12,500. For law students, the same addition led to a nearly $30,000 increase in salaries for the entire group.
These theoretical increases represent cumulative earnings distributed to all graduates. The researchers conducted dozens of alternative statistical checks to see if the relationship disappeared. They analyzed different thresholds of diversity and tested alternative ways of classifying student groups.
The positive relationship between racial representation and higher wages persisted across nearly all of these different measures. This result suggests that economic benefits are not limited to minority students. Rather, the varied environment appears to increase the earning potential of all professionals in the group.
This increased earning potential can be directly attributed to the interpersonal skills students develop as they experience diverse environments. Exposure to other cultures prepares young professionals to work effectively in a pluralistic society. This adaptability is highly valued by large law firms, public sector agencies and corporate employers serving a wide client base.
As with other observations, this result cannot conclusively prove that diversity directly leads to higher salaries. Completely controlled experiments to test this dynamic are virtually impossible in a university setting. Rather, the findings highlight the strong historical association between the two variables over decades of recorded behavior.
To further explore this relationship, the researchers used statistical tools to look at the sequence of events over time. They found that freshman diversity predicted graduate median salaries several years later.
The converse was not statistically significant. Unusually high graduate salaries did not predict well the diversity level of the next entering class. This body of research suggests that the relationship between school demographics and future pay is moving forward.
The authors noted that the Supreme Court left little leeway in addressing diversity. The justices allowed the university to consider the applicant’s arguments about how race has affected the individual’s life. The court also exempted military academies from the affirmative action ban, recognizing that national security may require diverse leadership.
The study authors suggested that similar exceptions could technically be claimed for business and legal training. The research team pointed to several avenues for future research to build on these findings. They recommended exploring the potential economic benefits of gender diversity in these academic programs.
They also said that future research should examine how specific racial classifications interact with gender to influence career outcomes. In the meantime, the authors suggested that academic administrators and business leaders should pay attention to economic indicators.
Sustaining diversity programs can have direct economic benefits that go beyond ethical arguments for social equality. This study provides measurable evidence that diverse perspectives in the classroom can lead to tangible financial benefits on payday.
The study, “Ethnic diversity in higher education is associated with higher student salaries,” was authored by Devanjan Mitra, Peter N. Golder, and Mariya Topchy.
