Hong, Han; Nekipelov, Denis - In: Journal of Econometrics 168 (2012) 1, pp. 60-69
In this paper we examine semiparametric efficiency bounds and efficient estimators for the case of a linear local instrument variable (LIV) model under the assumptions studied in Abadie et al. (2002). We apply the semiparametrically efficient estimation method to analyze the relation between...