Networks and Workouts: Treatment Size and Status Specific Peer Effects in a Randomized Field Experiment
NBER Working Paper No. 16581
Issued in December 2010
NBER Program(s): ED HE
This paper estimates treatment size and status specific peer effects that are not detected by widely-used approaches to the estimation of spillovers. In a field experiment using university students, we find that subjects who have been incentivized to exercise increase gym usage more if they have more treated friends. However, control subjects are not influenced by their peers. Findings demonstrate that fraction treated has a large influence on outcomes in this environment, and spillovers vary greatly by treatment status. Results highlight subtle effects of randomization and document a low-cost method for improving the generalizability of controlled interventions in networked environments.
The NBER Bulletin on Aging and Health provides summaries of publications like this.
You can sign up to receive the NBER Bulletin on Aging and Health by email.
This paper is available as PDF (332 K) or via email.
Machine-readable bibliographic record -
Document Object Identifier (DOI): 10.3386/w16581
Users who downloaded this paper also downloaded these:
|Babcock, Bedard, Charness, Hartman, and Royer
||w16687 Letting Down the Team? Evidence of Social Effects of Team Incentives
|Carrell, Hoekstra, and West
||w16518 Is Poor Fitness Contagious? Evidence from Randomly Assigned Friends
|Goldhaber-Fiebert, Blumenkranz, and Garber
||w16624 Committing to Exercise: Contract Design for Virtuous Habit Formation
|Royer, Stehr, and Sydnor
||w18580 Incentives, Commitments and Habit Formation in Exercise: Evidence from a Field Experiment with Workers at a Fortune-500 Company
||t0250 External Treatment Effects and Program Implementation Bias