University as a Melting Pot: Long-term Effects of Internationalization

International Students Boost Social Integration and Cultural Openness Without Harming Labor Market Outcomes

Studying with international students helps local students form more diverse social ties. It also develops more positive views on migration. Importantly, this diversity does not hurt their ability to find jobs or earn money later in life. This suggests that internationalization provides social benefits without economic costs.

Universities attract international students to grow revenue and expand social networks. However, many governments now implement restrictive policies to limit these inflows. Politicians often worry that foreign students might displace domestic students. They also fear negative impacts on the labor market.

Before this study, research on these peer effects was often fragmented. Most studies focused on short-term academic metrics. Existing literature examined whether foreign classmates affect graduation rates or expected earnings. But these studies often yielded inconclusive results. A critical question remained: does exposure to a diverse student body change the social fabric and long-term outlook of the native population?

The limits of academic-only metrics

Current evaluations of university internationalization focus mostly on academic achievement. They also look at immediate economic returns. Researchers have investigated whether foreign students influence graduation rates or GPA (Grade Point Average). Yet, these metrics miss broader societal shifts occurring in lecture halls. Earlier studies in the US and UK found varying results on whether foreign peers impact graduation or earnings. However, they rarely looked at how these interactions reshape a person's social identity.

This narrow focus overlooks the "contact hypothesis" (the theory that interpersonal contact between different groups can reduce prejudice). By treating internationalization as a purely economic variable, policymakers risk overlooking profound social transformations. These transformations happen during a student's formative years. As shown in, the share of international students in Dutch bachelor's programs rose from roughly 3% in the 1990s to over 20% by 2019.

This massive demographic shift demands a lens that looks beyond the transcript.

Tracking the preference-shift mechanism

To move beyond simple correlations, the authors employ an across-cohort design. This method exploits natural fluctuations in the number of international students entering specific programs each year. Instead of comparing different types of students, the study compares students within the same program across different entry years. This isolates the "treatment"—the level of international exposure—from variables like program quality.

The study distinguishes between two potential ways this exposure works: 1. Meeting opportunities: This mechanism suggests that internationalization simply provides a venue for people to meet. Once the university setting ends, the effect vanishes. 2. Preference shift: This mechanism suggests that repeated interaction actually changes a student's underlying attitudes and social preferences.

The authors find strong evidence for the preference-shift mechanism. They demonstrate that the effects are not just temporary. Instead, natives frequently establish intercultural ties outside their immediate academic environment. They also find that exposure alters attitudes toward migration and European unification. These empirical patterns suggest that exposure induces meaningful shifts in underlying preferences rather than merely providing convenient meeting opportunities.

Social gains meet economic neutrality

The findings reveal a striking divergence between social and economic outcomes. The paper reports that a 10 percentage point increase in the share of international students significantly boosts long-term social integration. Specifically, fifteen years after entering university, such an increase leads to a 5.9% increase in the probability of cohabiting with a non-native. This means that for every 10 extra international students in a program of 137, one additional native student will live with a non-native [Table 1].

The study also finds a 4.2% increase in the probability of marrying a non-native. Furthermore, the authors find that these students are 4% more likely to emigrate. This suggests a heightened international orientation.

Crucially, the study finds that these social benefits come with no apparent economic trade-off. The authors measure employment, income, entrepreneurship, and the share of foreign-born co-workers up to 25 years after university entry. They report precisely estimated zero effects across all these categories [Table 4]. This is a vital finding for the "crowding out" debate. It suggests that international students do not compete with natives for economic success.

The authors further demonstrate that these effects are not universal across all disciplines. Social integration is notably stronger in non-STEM (Science, Technology, Engineering, and Mathematics) fields and larger programs. In contrast, the paper finds that in highly competitive, male-dominated environments like STEM, the social benefits of international exposure are largely absent [Table A11]. This suggests that the "melting pot" effect requires a certain level of collaborative environment to function effectively.

Identifying the boundaries of the effect

While the results are robust, the study has clear boundaries. First, the research focuses specifically on the first year of a bachelor's program. The first year involves compulsory courses where students share curricula. This provides structured opportunities for peer interaction. The paper does not explore whether similar effects occur during specialized master's programs.

Second, the study lacks granular data on tutorial group assignments (small, instructor-led discussion groups). While students sit together in large lectures, their actual social lives are often dictated by these smaller groups. Since the researchers cannot see how these small groups were composed, they cannot definitively say how much interaction happened in these intimate settings.

Finally, the effectiveness of the "melting pot" depends on the cultural distance of the peers. The authors find that exposure to students from the European Economic Area (EEA+, which includes the EU, Iceland, Norway, and Switzerland) significantly boosts social integration. This is likely due to shared cultural and institutional backgrounds. However, interactions with non-EEA+ students do not show the same strong boost to formal social ties [Table A13]. They do, however, increase satisfaction with opportunities to learn about other cultures.

The verdict: A social asset, not a liability

If the goal of higher education is to produce both skilled professionals and socially cohesive citizens, the evidence points toward a clear "yes" for internationalization. The paper provides a powerful rebuttal to the idea that international students are an economic burden. Instead, it frames them as a catalyst for long-term social openness and global mobility.

For policymakers contemplating caps on international enrollment, the verdict is nuanced. Reducing these numbers may not save a single job or dollar in the local economy. However, it could significantly weaken the long-term social integration and cultural adaptability of the native workforce. The study suggests that the true value of a diverse university lies in the enduring shift in the preferences and social networks of its graduates.

Figures from the paper