Publication Type

Journal Article

Version

submittedVersion

Publication Date

11-2011

Abstract

In this paper we introduce a linear programming estimator (LPE) for the slope parameter in a constrained linear regression model with a single regressor. The LPE is interesting because it can be superconsistent in the presence of an endogenous regressor and, hence, preferable to the ordinary least squares estimator (LSE). Two different cases are considered as we investigate the statistical properties of the LPE. In the first case, the regressor is assumed to be fixed in repeated samples. In the second, the regressor is stochastic and potentially endogenous. For both cases the strong consistency and exact finite-sample distribution of the LPE is established. Conditions under which the LPE is consistent in the presence of serially correlated, heteroskedastic errors are also given. Finally, we describe how the LPE can be extended to the case with multiple regressors and conjecture that the extended estimator is consistent under conditions analogous to the ones given herein. Finite-sample properties of the LPE and extended LPE in comparison to the LSE and instrumental variable estimator (IVE) are investigated in a simulation study. One advantage of the LPE is that it does not require an instrument.

Discipline

Econometrics

Research Areas

Econometrics

Publication

Journal of Econometrics

Volume

165

Issue

1

First Page

128

Last Page

136

ISSN

0304-4076

Identifier

10.1016/j.jeconom.2011.05.011

Publisher

Elsevier: 24 months

Additional URL

https://doi.org/10.1016/j.jeconom.2011.05.011

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