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| Naorayex K Dastoor |
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| ''A simple explanation for the non-invariance of a Wald statistic to a reformulation of a null hypothesis'' |
| ( 2008, Vol. 3 No.62 ) |
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| For a given null hypothesis and its reformulation, the associated Wald statistics are shown to be members of a wider family of statistics where all members are asymptotically equivalent under the null hypothesis. Therefore, the non-invariance of a Wald statistic (to a reformulation of a null hypothesis) is equivalent to using different members of the wider family and, in addition, this non-invariance implies that these members use different estimators of an appropriate variance-covariance matrix. |
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| Keywords: |
JEL: C1 - Econometric and Statistical Methods: General
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| Manuscript Received : Aug 04 2008 | | Manuscript Accepted : Sep 30 2008 |
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