Is poor fitness contagious?
The increase in obesity over the past 30 years has led researchers to investigate the role of social networks as a contributing factor. However, several challenges make it difficult to demonstrate a causal link between friends’ physical fitness and own fitness using observational data. To overcome these problems, we exploit data from a unique setting in which individuals are randomly assigned to peer groups. We find statistically significant positive peer effects that are roughly half as large as the own effect of prior fitness on current fitness. Evidence suggests that the effects are caused primarily by friends who were the least fit, thus supporting the provocative notion that poor physical fitness spreads on a person-to-person basis.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Bruce Sacerdote, 2000.
"Peer Effects with Random Assignment: Results for Dartmouth Roommates,"
NBER Working Papers
7469, National Bureau of Economic Research, Inc.
- Bruce Sacerdote, 2001. "Peer Effects With Random Assignment: Results For Dartmouth Roommates," The Quarterly Journal of Economics, MIT Press, vol. 116(2), pages 681-704, May.
- Manski, Charles F, 1993.
"Identification of Endogenous Social Effects: The Reflection Problem,"
Review of Economic Studies,
Wiley Blackwell, vol. 60(3), pages 531-42, July.
- Manski, C.F., 1991. "Identification of Endogenous Social Effects: the Reflection Problem," Working papers 9127, Wisconsin Madison - Social Systems.
- Scott E. Carrell & Richard L. Fullerton & James E. West, 2009.
"Does Your Cohort Matter? Measuring Peer Effects in College Achievement,"
Journal of Labor Economics,
University of Chicago Press, vol. 27(3), pages 439-464, 07.
- Scott E. Carrell & Richard L. Fullerton & James E. West, 2008. "Does Your Cohort Matter? Measuring Peer Effects in College Achievement," NBER Working Papers 14032, National Bureau of Economic Research, Inc.
- John Cawley & Richard V. Burkhauser, 2006.
"Beyond BMI: The Value of More Accurate Measures of Fatness and Obesity in Social Science Research,"
NBER Working Papers
12291, National Bureau of Economic Research, Inc.
- Burkhauser, Richard V. & Cawley, John, 2008. "Beyond BMI: The value of more accurate measures of fatness and obesity in social science research," Journal of Health Economics, Elsevier, vol. 27(2), pages 519-529, March.
- David J. Zimmerman, 2003.
"Peer Effects in Academic Outcomes: Evidence from a Natural Experiment,"
The Review of Economics and Statistics,
MIT Press, vol. 85(1), pages 9-23, February.
- Zimmerman, David J., 1999. "Peer Effects in Academic Outcomes: Evidence From a Natural Experiment," Williams Project on the Economics of Higher Education DP-52, Department of Economics, Williams College.
- Stinebrickner, Ralph & Stinebrickner, Todd R., 2006.
"What can be learned about peer effects using college roommates? Evidence from new survey data and students from disadvantaged backgrounds,"
Journal of Public Economics,
Elsevier, vol. 90(8-9), pages 1435-1454, September.
- Todd R. Stinebrickner & Ralph Stinebrickner, 2005. "What Can Be Learned About Peer Effects Using College Roommates? Evidence From New Survey Data and Students from Disadvantaged Backgrounds," University of Western Ontario, CIBC Centre for Human Capital and Productivity Working Papers 20054, University of Western Ontario, CIBC Centre for Human Capital and Productivity.
- Ethan Cohen-Cole & Jason M. Fletcher, 2008.
"Is obesity contagious?: social networks vs. environmental factors in the obesity epidemic,"
Risk and Policy Analysis Unit Working Paper
QAU08-2, Federal Reserve Bank of Boston.
- Cohen-Cole, Ethan & Fletcher, Jason M., 2008. "Is obesity contagious? Social networks vs. environmental factors in the obesity epidemic," Journal of Health Economics, Elsevier, vol. 27(5), pages 1382-1387, September.
- Scott E. Carrell & Frederick V. Malmstrom & James E. West, 2008. "Peer Effects in Academic Cheating," Journal of Human Resources, University of Wisconsin Press, vol. 43(1).
- David S. Lyle, 2007. "Estimating and Interpreting Peer and Role Model Effects from Randomly Assigned Social Groups at West Point," The Review of Economics and Statistics, MIT Press, vol. 89(2), pages 289-299, May.
- Michael Kremer & Dan Levy, 2008. "Peer Effects and Alcohol Use among College Students," Journal of Economic Perspectives, American Economic Association, vol. 22(3), pages 189-206, Summer.
When requesting a correction, please mention this item's handle: RePEc:eee:pubeco:v:95:y:2011:i:7:p:657-663. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Zhang, Lei)
If references are entirely missing, you can add them using this form.