Published in Obesity and Diabetes Week, December 1st, 2008
"Journal of Medicine 357, 370-379] that obesity has spread through Social networks. It is well known in the economics literature that failure to include contextual effects can lead 10 spurious inference on ''social network effects.'' We replicate the NEJM results using their specification and a complementary dataset. We find that point estimates of the ''social network effect'' are reduced and become statistically indistinguishable...
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