Before revision:  For this model, under the assumption of a stochastic equilibrium selection rule, we prove that the marginal treatment effect (MTE) from one's own treatment and that from his/her partner's can be separately point-identified using a latent index framework . Based on our constructive identification results, we propose a two-step semiparametric procedure for estimating the MTE parameters using series approximation.
After revision:  For this model, under the assumption of a stochastic equilibrium selection rule, we prove that the marginal treatment effect (MTE) from one's own treatment and that from his/her partner's can be separately point-identified with potential over-identifiability . Based on our constructive identification results, we propose a two-step semiparametric procedure for estimating the MTE parameters using series approximation.