ADAPTIVE DENSITY ESTIMATION FOR GENERAL ARCH MODELS
一般 ARCH 模型的自适应密度估计AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接估计潜在波动的对数平方密度,并将理论应用于一般 ARCH 波动模型。
一般 ARCH 模型的自适应密度估计AI 解读 ↓
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We consider a model Y t = σ t η t in which (σ t ) is not independent of the noise process (η t ) but σ t is independent of η t for each t . We assume that (σ t ) is stationary, and we propose an adaptive estimator of the density of ln(σ t 2 ) based on the observations Y t . Under a new dependence structure, the τ-dependency defined by Dedecker and Prieur (2005, Probability Theory and Related Fields 132, 203–236), we prove that the rates of this nonparametric estimator coincide with the rates obtained in the independent and identically distributed (i.i.d.) case when (σ t ) and (η t ) are independent. The results apply to various linear and nonlinear general autoregressive conditionally heteroskedastic (ARCH) processes. They are illustrated by simulations applying the deconvolution algorithm of Comte, Rozenholc, and Taupin (2006, Canadian Journal of Statistics 34, 431–452) to a new noise density.