On an asymptotically more efficient estimation of the single-index model
In this note, we revisit the single-index model with heteroscedastic error, and recommend an estimating equation method in terms of transferring restricted least squares to unrestricted least squares: the estimator of the index parameter is asymptotically more efficient than existing estimators in the literature in the sense that it is of a smaller limiting variance.
Volume (Year): 101 (2010)
Issue (Month): 8 (September)
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