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MIT: Would you return a favor? Scientists say it depends on the relationship
June 11, 2026
CAMBRIDGE, Massachusetts, June 11 -- The Massachusetts Institute of Technology posted the following news:

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Would you return a favor? Scientists say it depends on the relationship

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When a friend buys you a cup of coffee, it's likely that next time, you'll return the gesture. This type of reciprocal generosity has been well-documented in behavioral economic studies.

However, anthropologists and other social scientist . . .

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