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- W2023152812 abstract "In the M-estimation theory developed by Huber (1964, Ann. Math. Statist. 43 , 1449–1458), the parameter under estimation is the value of θ which minimizes the expectation of what is called a discrepancy measure (DM) δ ( X , θ ) which is a function of θ and the underlying random variable X . Such a setting does not cover the estimation of parameters such as the multivariate median defined by Oja (1983) and Liu (1990), as the value of θ which minimizes the expectation of a DM of the type δ ( X 1 , …, X m , θ ) where X 1 , …, X m are independent copies of the underlying random variable X . Arcones et al. (1994, Ann. Statist. 22 , 1460–1477) studied the estimation of such parameters. We call such an M-type MU-estimation (or μ -estimation for convenience). When a DM is not a differentiable function of θ , some complexities arise in studying the properties of estimators as well as in their computation. In such a case, we introduce a new method of smoothing the DM with a kernel function and using it in estimation. It is seen that smoothing allows us to develop an elegant approach to the study of asymptotic properties and possibly apply the Newton–Raphson procedure in the computation of estimators." @default.
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- W2023152812 date "2001-02-01" @default.
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- W2023152812 title "MU-Estimation and Smoothing" @default.
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- W2023152812 doi "https://doi.org/10.1006/jmva.2000.1916" @default.
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