Anecdote
发表于 2025-3-23 12:48:06
Gesche Pospiech largest estimation error in their expected returns. The difficulty in estimating expected return implies that improvement in portfolio optimization is feasible via an accurate estimation of the expected covariance matrix. Therefore, the selection of the appropriate variance-covariance model is cruc
ethereal
发表于 2025-3-23 15:15:06
first to construct the trajectory of histories and then to apply straightforward regression techniques to build ad-hoc models for the underlying dynamics. In this respect, the method of local approximation (Farmer and Sidorowich 1987; Casdagli 1989, 1992) is an effective approach using only nearby
collateral
发表于 2025-3-23 21:57:11
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Blood-Clot
发表于 2025-3-24 00:08:55
André Heck,Onne van Buuren first to construct the trajectory of histories and then to apply straightforward regression techniques to build ad-hoc models for the underlying dynamics. In this respect, the method of local approximation (Farmer and Sidorowich 1987; Casdagli 1989, 1992) is an effective approach using only nearby
温和女孩
发表于 2025-3-24 03:40:59
Marie-Annette Geyer,Wiebke Kuske-Janßend amplitudes. This is an effective approach when the given function is stationary. However, when the characteristics at each frequency change over time or there are singularities, Fourier analysis will give us the average of the changing frequencies over the whole function, whereas wavelet analysis
繁忙
发表于 2025-3-24 08:22:42
Olaf KreyY in the sense of Granger causality. Of course the direction of causality can be inversed. Notice also that the vector autoregressive (VAR) model popularized in econometric literature by Sims (1980), coupled with block exogeneity tests (or also referred to as Granger causality tests) is central to s
menopause
发表于 2025-3-24 13:42:40
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mediocrity
发表于 2025-3-24 17:47:18
Mark Eichenlaub,Edward F. RedishY in the sense of Granger causality. Of course the direction of causality can be inversed. Notice also that the vector autoregressive (VAR) model popularized in econometric literature by Sims (1980), coupled with block exogeneity tests (or also referred to as Granger causality tests) is central to s
obsolete
发表于 2025-3-24 19:47:47
Ileana M. Greca,Ana Raquel Pereira de Ataídes. It could be used for a mixed or hybrid finite element approach. In the paper “exact” stiffness matrices are obtained via the integration of the local equations of the principle in the form of a system of first-order ordinary differential equations. Numerical results of sample problems are given.
钢盔
发表于 2025-3-25 00:50:13
Onne van Buuren,André Hecks. It could be used for a mixed or hybrid finite element approach. In the paper “exact” stiffness matrices are obtained via the integration of the local equations of the principle in the form of a system of first-order ordinary differential equations. Numerical results of sample problems are given.