The Influence of Body Weight on Social Network Ties Among Adolescents
Mir M. Ali
Substance Abuse & Mental Health Services Administration
University of Toledo - Department of Economics
John A. Rizzo
Stony Brook University - Department of Economics and Department of Preventative Medicine
October 7, 2011
Economics & Human Biology, Forthcoming
Evidence of negative stereotypes, prejudice and discrimination towards obese individuals has been widely documented. However, the effect of a larger body size on social network ties or friendship formations is less well understood. In this paper, we explore the extent to which higher body weight results in social marginalization of adolescents. Using data from a nationally-representative sample of adolescents, we estimate endogeneity-corrected models including school-level fixed effects that account for bi-directionality and unobserved confounders to ascertain the effect of body weight on social network ties. We find that obese adolescents have fewer friends and are less socially integrated than their non-obese counterparts. We also find that such penalties in friendship networks are present among whites but not African-Americans or Hispanics, with the largest effect among white females. These results are robust to common environmental influences at the school-level and to controls for preferences, risk attitudes, low self-esteem and objective measures of physical attractiveness.
Number of Pages in PDF File: 37
Keywords: Social Networks, Adolescents, Body Weight
JEL Classification: I12, J10, Z13
Date posted: October 7, 2011
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