endogeneity and attrition/non-response bias, using two instrumental variables. Making use of a discrete instrument for the …

endogeneity and attrition/non-response bias, using two instrumental variables. Making use of a discrete instrument for the …

local and marginal treatment effects. First, we characterize the bias, due to the omitted variables U, of (nonparametric …) regression and instrumental variables estimands, thereby generalizing the classic linear regression omitted variable bias formula …

demonstrate that one of the proposed methods to address non-uniqueness that relies on computing bias-adjusted treatment effects …, and therefore conclusions about bias, can change dramatically if we deviate from equal selection even by a small magnitude. …

effect having an opposite sign from the true effect. We present an expression for the asymptotic bias of both OLS and IV … estimators and discuss the conditions under which sign reversal may occur. We provide a method for eliminating this bias when …