Author

Fu-I Chang

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Preprint Aug 2026

Bias Reduction for Local Polynomial Derivative Estimation

Local polynomial smoothing is commonly used in non-parametric regression, but local linear derivative estimation still has a bias of order $O(h^2)$. This paper proposes an iterative data sharpening method to reduce the bias of derivative estimates while retaining the simplicity of local linear fitting. The method is ba...

Fu-I Chang, W. Braun · 0 citations