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The Empirical Trap of Sign Reversals with Equality Restrictions

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Author Info
Stephen E. Haynes () (Department of Economics, University of Oregon)
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.

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File URL: http://economics.uoregon.edu/papers/UO-2005-8_Haynes_Reversals.pdf
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Publisher Info
Paper provided by University of Oregon Economics Department in its series University of Oregon Economics Department Working Papers with number 2005-8.

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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: General - - - Hypothesis Testing
C52 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Evaluation and Testing

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Frankel, Jeffrey A, 1979. "On the Mark: A Theory of Floating Exchange Rates Based on Real Interest Differentials," American Economic Review, American Economic Association, vol. 69(4), pages 610-22, September. [Downloadable!] (restricted)
  2. Modigliani, Franco & Sterling, Arlie, 1986. "Government Debt, Government Spending and Private Sector Behavior: Comment," American Economic Review, American Economic Association, vol. 76(5), pages 1168-79, December. [Downloadable!] (restricted)
  3. Bruce A. Blonigen & Ronald B. Davies & Keith Head, 2003. "Estimating the Knowledge-Capital Model of the Multinational Enterprise: Comment," American Economic Review, American Economic Association, vol. 93(3), pages 980-994, June. [Downloadable!]
    Other versions:
  4. David L. Carr & James R. Markusen & Keith E. Maskus, 2001. "Estimating the Knowledge-Capital Model of the Multinational Enterprise," American Economic Review, American Economic Association, vol. 91(3), pages 693-708, June. [Downloadable!] (restricted)
    Other versions:
  5. Barth, James R & Iden, George & Russek, Frank S, 1986. "Government Debt, Government Spending, and Private Sector Behavior: Comment," American Economic Review, American Economic Association, vol. 76(5), pages 1158-67, December. [Downloadable!] (restricted)
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