Abstract.
It is often required to estimate a quadratic form in survey sampling, especially when one has to estimate the mean squared error of a linear estimator of the population total. In this note we consider the problem of obtaining uniformly nonnegative quadratic unbiased estimators for nonnegative definite quadratic forms. The estimators considered here are necessarily quadratic.
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Received January 1997
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Padmawar, V. On estimating nonnegative definite quadratic forms. Metrika 48, 231–244 (1998). https://doi.org/10.1007/PL00003975
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DOI: https://doi.org/10.1007/PL00003975