We develop a new method, based on the use of polar coordinates, to investigate the existence of moments for instrumental variables and related estimators in the linear regression model. For generalized IV estimators, we obtain familiar results. For JIVE, we obtain the new result that this estimator has no moments at all. Simulation results illustrate the consequences of its lack of moments.
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Paper provided by McGill University, Department of Economics in its series Departmental Working Papers with number
2006-22.
Find related papers by JEL classification: C10 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: General - - - General C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: General - - - Hypothesis Testing C30 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - General
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Russell Davidson & James G. MacKinnon, 2004.
"The Case Against JIVE,"
Working Papers
1031, Queen's University, Department of Economics.
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Cited by: (explanations, 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.)
Russell Davidson & James G. MacKinnon, 2004.
"The Case Against JIVE,"
Working Papers
1031, Queen's University, Department of Economics.
[Downloadable!]
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