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Rate of convergence of k-step Newton estimators to efficient likelihood estimators

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  • Verrill, Steve

Abstract

We make use of Cramer conditions together with the well-known local quadratic convergence of Newton's method to establish the asymptotic closeness of k-step Newton estimators to efficient likelihood estimators. In Verrill and Johnson [2007. Confidence bounds and hypothesis tests for normal distribution coefficients of variation. USDA Forest Products Laboratory Research Paper FPL-RP-638], we use this result to establish that estimators based on Newton steps from -consistent estimators may be used in place of efficient solutions of the likelihood equations in likelihood ratio, Wald, and Rao tests. Taking a quadratic mean differentiability approach rather than our Cramer condition approach, Lehmann and Romano [2005. Testing Statistical Hypotheses, third ed. Springer, New York] have outlined proofs of similar results. However, their Newton step estimator results actually rely on unstated assumptions about Cramer conditions. Here we make our Cramer condition assumptions and their use explicit.

Suggested Citation

  • Verrill, Steve, 2007. "Rate of convergence of k-step Newton estimators to efficient likelihood estimators," Statistics & Probability Letters, Elsevier, vol. 77(12), pages 1371-1376, July.
    • Handle: RePEc:eee:stapro:v:77:y:2007:i:12:p:1371-1376
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