Showing 1 - 10 of 19
We consider a two-scaled diffusion system, when drift and diffusion parameters of the 'slow' component are contaminated by the ' fast' unobserved component. The goal is to estimate the dynamic function which is defined by averaging the drift coefficient of the 'slow' component w.r.t. the...
Persistent link: https://www.econbiz.de/10010309898
In this paper we study nonparametric estimation and hypothesis testing procedures for the functional coefficient AR (FAR) models of the form Xt = f1(Xt-d)Xt-1 +…+ fp(Xt-d)Xt-p +εt, first proposed by Chen and Tsay (1993). As a direct generalization of the linear AR model, the FAR model is a...
Persistent link: https://www.econbiz.de/10010309907
We study the problem of estimating the coefficients of a diffusion (Xl, t 2: 0); the estimation is based on discrete data Xn . . n = 0, 1, ... ,N. The sampling frequency delta t is constant , and asymptotics arc taken at the number of observations tends to infinity. We prove that the problem of...
Persistent link: https://www.econbiz.de/10010310543
asymptotic distribution is derived and shown to be approximated by a bootstrap procedure. …
Persistent link: https://www.econbiz.de/10010309854
observations. Accordingly, we propose an i.i.d.-type bootstrap to determine the critical value for the test. …
Persistent link: https://www.econbiz.de/10010309888
We prove geometric ergodicity and absolute regularity of the nonparametric autoregressive bootstrap process. To this … sequence. This is achieved by using well-established coupling techniques. Then we apply the result to the bootstrap process and … bootstrap process has the desired properties. Moreover, by using some 'decoupling' argument, we show that the stationary density …
Persistent link: https://www.econbiz.de/10010309890
often not provided. If confidence intervals are given they are often based on bootstrap methods with poor theoretical …
Persistent link: https://www.econbiz.de/10010310003
One puzzling behavior of asset returns for various frequencies is the often observed positive autocorrelation at lag 1. To some extent this can be explained by standard asset pricing models when assuming time varying risk premia. However, one often finds better results when directly fitting an...
Persistent link: https://www.econbiz.de/10010310056
bootstrap versions of the tests have much better properties in this respect. In other words, the bootstrap can be used to size …
Persistent link: https://www.econbiz.de/10010310188
fixed link functions. In this paper we consider a bootstrap specification test that detects nonparametric deviations of the … link function. The bootstrap is used with the aim to find a more accurate distribution under the null than the normal … we show that the bootstrap is able to capture the negative bias and the skewness of the test statistic. It yields better …
Persistent link: https://www.econbiz.de/10010310223