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Valid Confidence Intervals and Inference in the Presence of Weak Instruments

  • Zivot, Eric
  • Startz, Richard
  • Nelson, Charles R

The authors investigate confidence intervals and inference for the instrumental variables model with weak instruments. Confidence intervals based on inverting the Lagrange multiplier (LM), likelihood ration (LR), and Anderson-Robin statistics perform far better than the Wald. Performance of the LM and LR statistics is improved by a degrees-of-freedom correction in the overidentified case. The practice of pretesting by looking at the significance of the first-stage regression and then making inference based on the LM or LR statistics leads to better results than pretesting and using the Wald statistic. Copyright 1998 by Economics Department of the University of Pennsylvania and the Osaka University Institute of Social and Economic Research Association.

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Article provided by Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association in its journal International Economic Review.

Volume (Year): 39 (1998)
Issue (Month): 4 (November)
Pages: 1119-46

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Handle: RePEc:ier:iecrev:v:39:y:1998:i:4:p:1119-46
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  1. Robert E. Hall, 1981. "Intertemporal Substitution in Consumption," NBER Working Papers 0720, National Bureau of Economic Research, Inc.
  2. Joshua D. Angrist & Alan B. Krueger, 1990. "Does Compulsory School Attendance Affect Schooling and Earnings?," NBER Working Papers 3572, National Bureau of Economic Research, Inc.
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  5. Dufour, J.M., 1995. "Some Impossibility Theorems in Econometrics with Applications to Instrumental Variables, Dynamic Models and Cointegration," Cahiers de recherche 9539, Universite de Montreal, Departement de sciences economiques.
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  12. John Y. Campbell & N. Gregory Mankiw, 1989. "Consumption, Income and Interest Rates: Reinterpreting the Time Series Evidence," NBER Chapters, in: NBER Macroeconomics Annual 1989, Volume 4, pages 185-246 National Bureau of Economic Research, Inc.
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  14. Rotemberg, Julio J, 1984. "Interpreting the Statistical Failures of Some Rational Expectations Macroeconomic Models," American Economic Review, American Economic Association, vol. 74(2), pages 188-93, May.
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