Showing 1 - 10 of 235
We use ideas from estimating function theory to derive new, simply computed consistent covariance matrix estimates in nonparametric regression and in a class of semiparametric problems. Unlike other estimates in the literature, ours do not require auxiliary or additional nonparametric...
Persistent link: https://www.econbiz.de/10009631747
This paper discusses a methodology which uses time series cross sectional datafor the estimation of a time dependent … regression function depending on explanatory variables and for the prediction of values of the dependent variable. The … minimization of a cross-validation criterion. In the prediction case the window contains only actual and past observations. It is …
Persistent link: https://www.econbiz.de/10009578017
The paper is concerned with the estimation of the long memory parameter in a conditionally heteroskedastic model … models ; semiparametric estimation ; modified R/S ; KPSS and V/S statistics ; periodogram …
Persistent link: https://www.econbiz.de/10009581091
. Alternatively to the direct local linear estimators of the k-step prediction functions which enter the GIR estimator the use of … multi-stage prediction techniques is suggested. Simulation experiments show the latter estimator to perform best. For …
Persistent link: https://www.econbiz.de/10009612034
Persistent link: https://www.econbiz.de/10001916840
paper extends this approach to the simultaneous estimation of both the function and its derivatives by combining the … integration procedure with a local polynomial approach. Finally the merits of this procedure with respect to the estimation of a … ; Additive Models ; Derivative Estimation ; Production Function …
Persistent link: https://www.econbiz.de/10009657128
In this paper a Canonical Correlation Analysis (CCA) is used to test the hypothesis r = r0 against the alternative r …
Persistent link: https://www.econbiz.de/10009578561
Based on daily VDAX data this paper analyzes the factors governing the movements of implied volatilities of options on the German stock index DAX. Using Principal Components Analysis over the sample period from 1996 to 1997, we derive common factors representing "shift" and "curvature" of the...
Persistent link: https://www.econbiz.de/10009612026
This paper proposes a nonparametric test of the non-convexity of a smooth regression function based on least squares or hybrid splines. By a simple formulation of the convexity hypothesis in the class of all polynomial cubic splines, we build a test which has an asymptotic size equal to the...
Persistent link: https://www.econbiz.de/10009578020
We develop a new test of a parametric model of a conditional mean function against a nonparametric alternative. The test adapts to the unknown smoothness of the alternative model and is uniformly consistent against alternatives whose distance from the parametric model converges to zero at the...
Persistent link: https://www.econbiz.de/10009579179