The Empirical Trap of Sign Reversals with Equality Restrictions
Abstract
This note explores the insidious empirical trap posed by two common equality restrictions in regression analysis. The trap is that restricted coefficients can lie outside the interval of unrestricted coefficients and even reverse sign when negatively correlated regressors are added to one another or when positively correlated regressors are subtracted from one another.Download Info
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Paper provided by University of Oregon Economics Department in its series University of Oregon Economics Department Working Papers with number 2005-8.Length: 11
Date of creation: 15 Jan 2005
Date of revision:
Handle: RePEc:ore:uoecwp:2005-8
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Related research
Keywords: Equality restrictions; Sign reversals; Invalid restrictions;Find related papers by JEL classification:
- C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
- C52 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Evaluation, Validation, and Selection
This paper has been announced in the following NEP Reports:
- NEP-ALL-2005-06-05 (All new papers)
- NEP-ECM-2005-06-05 (Econometrics)
References
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