Showing 1 - 10 of 73
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
, Continuous-time financial models, Semiparametric methods, Kernel smoothing …
Persistent link: https://www.econbiz.de/10009613611
We consider problems in modelling job-matching in the Czech Republic during the transition to a market economy. Special interest is devoted to functional form considerations and the analysis of returns to scale of the matching function. This explorative study aims to shed some light into the...
Persistent link: https://www.econbiz.de/10009574874
We introduce a nonparametric smoothing procedure for nonparametric factor analaysis of multivariate time series. The … macromodel. -- Factor Analysis ; Time Series ; Kernel estimation ; Nonparametric …
Persistent link: https://www.econbiz.de/10009578000
consideration in independent and identical parts. A tail condition on the distribution of the recurrence time is introduced. This … convergence rate is slower than in the stationary case, and it is directly linked to the tail behaviour of the recurrence time …. -- null recurrent Markov chain ; nonparametric kernel estimators ; Nonstationary time series models ; split chain …
Persistent link: https://www.econbiz.de/10009578015
This paper discusses a methodology which uses time series cross sectional datafor the estimation of a time dependent … observations from an adaptive running time window. The adaptation consists in the selection of the length (or horizon) of such a …
Persistent link: https://www.econbiz.de/10009578017
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
time series. It is well known that the usual nonparametric models often have less than satisfactory performance when …
Persistent link: https://www.econbiz.de/10009578559
A procedure for testing equality across nonparametric regressions is proposed. The procedure allows for any dimension of the explanatory variables and for any number of subsamples. We consider the case of random explanatory variables and allow the designs of the regressors and the number of...
Persistent link: https://www.econbiz.de/10009578576
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