By Christopher G. Small
ISBN-10: 0191545090
ISBN-13: 9780191545092
ISBN-10: 0198506880
ISBN-13: 9780198506881
Non linearity arises in statistical inference in a number of methods, with various levels of severity, as a disadvantage to statistical research. extra entrenched varieties of nonlinearity frequently require extensive numerical tips on how to build estimators, and using root seek algorithms, or one-step estimators, is a customary approach to resolution. This e-book presents a finished research of nonlinear estimating equations and synthetic likelihood's for statistical inference. It presents wide insurance and comparability of hill hiking algorithms, which whilst begun at issues of nonconcavity frequently have very terrible convergence houses, and for added flexibility proposes a couple of amendment to the normal tools for fixing those algorithms. The e-book additionally extends past easy root seek algorithms to incorporate a dialogue of the checking out of roots for consistency, and the amendment of obtainable estimating features to supply larger balance in inference. a number of examples from useful functions are incorporated to demonstrate the issues and percentages therefore making this article excellent for the study statistician and graduate scholar.
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Extra resources for Numerical methods for nonlinear estimating equations
Sample text
In particular, this semimartingale becomes a martingale when θ = θ0, a result that parallels the unbiasedness of estimating functions considered earlier. Within the class of Hutton–Nelson estimating functions, it is possible to find one which maximises the Godambe efficiency. 21) where Wt is standard Brownian motion and σ > 0 is the volatility or the diffusion coefficient. According to the Black–Scholes model, the parameter θ = r − q, where r is the risk-free interest rate, and q is a continous dividend yield.
The following example illustrates how the asymptotic error can be obtained for the zero-truncated Poisson model. 1 Truncated Poisson model Consider the estimation of a parameter θ from the zero-truncated Poisson distribution having probability function where θ > 0 and y = 1, 2, 3, … The zero-truncated Poisson distribution arises in the analysis of Poisson count data where a count is reported only when one or more events are observed. 1) where Y = ∑Yj. 2) where Y = Y/n. Thus θ̂ is seen to be a sample mean that is rescaled to adjust for zero-truncation.
It may be known that the consistent root will be close to some simple consistent estimator with high probability. If this is the case, the consistent estimator is a natural value for initialising a root search algorithm. For some applications involving location parameters, it will be known that all reasonable estimators will lie in the interval defined between the smallest and largest observation in the data set. Algorithms that require a search over successively smaller intervals can be initialised over the range of values defined by the data.
Numerical methods for nonlinear estimating equations by Christopher G. Small
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