Hong, G., Raudenbush, S. W. (2013). Heterogeneous agents, social interactions, and causal inference.

This chapter presents a model that relaxes the conventional causal framework by incorporating agents and social interactions. We define a treatment setting for an individual participant as a local environment constituted by a set of agents and participants along with their treatment assignments. We also incorporate new models for social interference as a part of the meditation mechanism.

Hong, G., Raudenbush, S. W. (2013). Heterogeneous agents, social interactions, and causal inference. In the Handbook of Causal Analysis for Social Research (pp.331-352) edited by Stephen L. Morgan. NY: Springer.