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I study the impact of exposure to international students in the first year of a bachelor’s program in the Netherlands. I exploit idiosyncratic cohort-to-cohort variation in the share of international students within programs. I use linked admin and survey data on one million students over 30 years.

Here is what I found: Social integration increases  Exposure to international students makes native students: - More likely to cohabit with a non-native 15 years later, - More likely to marry a non-native 15 years later.

Many of these relationships are formed outside the university, indicating genuine preference shifts rather than simple “meeting opportunities.”