Econometric Theory

Articles

Improving Some Instrumental Variables Test Procedures

Michael A. Magdalinosa1

a1 Athens School of Economics and Business Science

Abstract

This paper is concerned with Cornish–Fisher corrections of some instrumental variables test statistics. The tests based on the corrected statistics have size with error of a smaller order of magnitude than the original tests. Symmetric Edgeworth-corrected confidence regions are also defined for the structural parameters. All these corrections are given as analytic formulas that require only limited information, so their implementation is a relatively easy task.