Nonparametric instrumental variable (NPIV) estimation is a cutting‐edge methodological framework employed to uncover causal relationships in the presence of endogenous regressors, without imposing ...

In the usual Gauss-Markov (GM) framework of structural linear models, the GM estimators of the regression parameters become inconsistent if at least one of the ...

Abstract: Bias due to unobserved confounding can seldom be ruled out with certainty when estimating the causal effect of a nonrandomized treatment. The instrumental variable (IV) design offers, under ...

The estimation of economic relationships often confronts the challenge of weak instruments – variables that are only weakly correlated with endogenous regressors. Such weakness can lead to substantial ...

This paper extends the usual Instrumental Variables estimator of the parameters of a linear regression involving stochastic regressors to the case where these parameters are subject to exact linear ...

Results of Phase III Randomized Trial for Use of Docetaxel as a Radiosensitizer in Patients With Head and Neck Cancer, Unsuitable for Cisplatin-Based Chemoradiation Sixty-five empirical papers were ...

A frequent problem in the estimation of linear regression models is that the predictors are correlated with the error term contained in the regression equation. To ...

PURPOSE: To compare the effectiveness of chemotherapy given to elderly patients in routine practice for stage IV non–small-cell lung cancer (NSCLC) with the efficacy observed in randomized trials.