Author = Abdalla T. El-Helbawy
| Number of Articles: 4 | ||
| 1 | A Note on the Wald, Lagrangian Multiplier and Likelihood Ratio Tests when the Information Matrix is Singular | |
| Volume 32, Issue 2, December 1988, Page 135-152 | ||
| Abdalla T. El-Helbawy; Tawfik Hassan | ||
| 2 | Simple Methods for Testing Treatment Constraints in Paired Comparisons | |
| Volume 29, Issue 2, December 1985, Page 59-72 | ||
| Abdalla T. El-Helbawy | ||
| 3 | A Note on the Limiting Distribution of the Likelihood Ratio Statistic for Testing Equality Constraints | |
| Volume 27, Issue 2, December 1983, Page 62-71 | ||
| Abdalla T. El-Helbawy; Naeem A. Soliman | ||
| 4 | A Note on the Asymptotic Properties of Constrained ML Estimators Under a Class of Local Alternatives When the Information Matrix is Singular | |
| Volume 26, Issue 1, June 1982, Page 30-41 | ||
| Abdalla T. El-Helbawy | ||
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