Peer-Effects on Childhood Obesity: An Instrumental Variables Approach on Exogenously Assigned Peers

This study investigates whether peers are a contributing factor in childhood body-weight outcomes. Using an instrumental variables method on exogenously assigned peers, we find that the weight of peers within the same grade and school significantly impacts body mass index (BMI) z-score of an individual student. A typical student’s BMI z-score increases when facing heavier peers. The size of the peer-effect, however, is very modest. For a percentage point increase in the proportion of obese students in the same grade, a typical student’s BMI z-score increases by only 0.00341 standard deviations.

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Conference Paper/ Presentation
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JEL Codes:
D10; I10; Z13

 Record created 2017-04-01, last modified 2020-10-28

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