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MELE: MAXIMUM ENTROPY LEUVEN ESTIMATORS AgEcon
Paris, Quirino.
Multicollinearity hampers empirical econometrics. The remedies proposed to date suffer from pitfalls of their own. The ridge estimator is not generally accepted as a vital alternative to the ordinary least-squares (OLS) estimator because it depends upon unknown parameters. The generalized maximum entropy (GME) estimator of Golan, Judge and Miller depends upon subjective exogenous information that affects the estimated parameters in an unpredictable way. This paper presents novel maximum entropy estimators inspired by the theory of light that do not depend upon any additional information. Monte Carlo experiments show that they are not affected by any level of multicollinearity and dominate OLS uniformly. The Leuven estimators are consistent and...
Tipo: Working or Discussion Paper Palavras-chave: Multicollinearity; Mean squared error; Ordinary least squares; Generalized maximum entropy; Research Methods/ Statistical Methods; C2.
Ano: 2001 URL: http://purl.umn.edu/11991
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Fitting a taper function to minimize the sum of absolute deviations Scientia Agricola
Silva,Lana Mirian Santos da; Rodriguez,Luiz Carlos Estraviz; Caixeta Filho,José Vicente; Bauch,Simone Carolina.
Multiple product inventories of forests require accurate estimates of the diameter, length and volume of each product. Taper functions have been used to precisely describe tree form, once they provide estimates for the diameter at any height or the height at any diameter. This study applied a goal programming technique to estimate the parameters of two taper functions to describe individual tree forms. The goal programming formulation generates parameters that minimize total absolute deviations (MOTAD). These parameters generated by the MOTAD method were compared to those of ordinary least squares (OLS) method. The analysis used a set of 178 trees cut from cloned eucalyptus plantations in the Southern part of the state of Bahia, Brazil. The values of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: MOTAD; Ordinary least squares; Goal programming; Linear regression.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500007
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