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- W2247222220 abstract "Author(s): Fan, Jianqing; Yao, Qiwei | Abstract: Conditional heteroscedasticity has been often used in modelling and understanding the variability of statistical data. Under a general setup which includes the nonlinear time series model as a special case, we propose an e cient and adaptive method for estimating the conditional variance. The basic idea is to apply a local linear regression to the squared residuals. We demonstrate that without knowing the regression function, we can estimate the conditional variance asymptotically as well as if the regression were given. This asymptotic result, established under the assumption that the observations are made from a strictly stationary and absolutely regular process, is also veri ed via simulation. Further, the asymptotic result paves the way for adapting an automatic bandwidth selection scheme. An application with nancial data illustrates the usefulness of the proposed techniques." @default.
- W2247222220 created "2016-06-24" @default.
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- W2247222220 date "1998-09-01" @default.
- W2247222220 modified "2023-09-23" @default.
- W2247222220 title "Efficient estimation of conditional variance functions in stochastic regression" @default.
- W2247222220 hasPublicationYear "1998" @default.
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