TY - JOUR
T1 - Vaccines, contagion, and social networks
JF - Annals of Applied Statistics
Y1 - 2017
A1 - Ogburn, E. L.
A1 - VanderWeele, T. J.
KW - causal inference
KW - Contagion
KW - Peer effects
KW - SOCIAL networks
AB - Consider the causal effect that one individual’s treatment may have on another individual’s outcome when the outcome is contagious, with specific application to the effect of vaccination on an infectious disease outcome. The effect of one individual’s vaccination on another’s outcome can be decomposed into two different causal effects, called the “infectiousness” and “contagion” effects. We present identifying assumptions and estimation or testing procedures for infectiousness and contagion effects in two different settings: (1) using data sampled from independent groups of observations, and (2) using data collected from a single interdependent social network. The methods that we propose for social network data require fitting generalized linear models (GLMs). GLMs and other statistical models that require independence across subjects have been used widely to estimate causal effects in social network data, but because the subjects in networks are presumably not independent, the use of such models is generally invalid, resulting in inference that is expected to be anticonservative. We describe a subsampling scheme that ensures that GLM errors are uncorrelated across subjects despite the fact that outcomes are nonindependent. This simultaneously demonstrates the possibility of using GLMs and related statistical models for network data and highlights their limitations. © Institute of Mathematical Statistics, 2017.
VL - 11
N1 - Export Date: 2 October 2017Funding details: ES017876, NIH, National Institutes of HealthFunding details: N00014-15-1-2343, ONR, Office of Naval ResearchFunding text: Supported by ONR Grant N00014-15-1-2343. Supported by NIH Grant ES017876.
U1 - causal inference methods
ER -