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Particle swarm optimization based Liu-type estimator

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<mark>Journal publication date</mark>17/11/2017
<mark>Journal</mark>Communications in Statistics - Theory and Methods
Issue number22
Number of pages12
Pages (from-to)11358-11369
Publication StatusPublished
<mark>Original language</mark>English


In this study, a new method for the estimation of the shrinkage and biasing parameters of Liu-type estimator is proposed. Because k is kept constant and d is optimized in Liu’s method, a (k, d) pair is not guaranteed to be the optimal point in terms of the mean square error of the parameters. The optimum (k, d) pair that minimizes the mean square error, which is a function of the parameters k and d, should be estimated through a simultaneous optimization process rather than through a two-stage process. In this study, by utilizing a different objective function, the parameters k and d are optimized simultaneously with the particle swarm optimization technique.