Showing 1 - 10 of 148
We consider semiparametric log periodogram regression estimation of memory parameter for the latent process in long memory stochastic volatility models. It is known that though widely used among researchers, the Geweke and Porter-Hudak (1983; GPH) LP estimator violates the Gaussian or Martingale...
Persistent link: https://www.econbiz.de/10005130237
We consider a semiparametric log periodogram regression estimation of memory parameter $d$ for non-stationary fractional time series using wavelet transformation. We propose wavelet-based log periodogram regression estimator, and obtain the asymptotic mean squared error, consistency and...
Persistent link: https://www.econbiz.de/10005342229
This paper provides conditions for identification and estimation of the conditional or unconditional average effect of … variable could be an instrument or a second mismeasure of treatment. Estimation takes the form of either ordinary GMM or a … local GMM that is proposed, which can be used generally to nonparametrically estimate functions from conditional moment …
Persistent link: https://www.econbiz.de/10005063591
Finite-sample inference methods are developed for quantile regression models. The methods are conservative in that (i) they apply to arbitrary sample sizes without the liberal assumption that sample sizes approach infinity, (ii) they apply when the quantiles are partially or set identified,...
Persistent link: https://www.econbiz.de/10005063611
A quadratic function is frequently used in regression to infer the existence of an extremum in a relationship. Examples abound in fields such as economics, epidemiology and environmental science. However, most applications provide no formal test of the extremum. Here we compare the Delta method...
Persistent link: https://www.econbiz.de/10005063624
Copulas offer a convenient way of modelling multivariate observations and capturing the intrinsic dependence between the components of a multivariate random variable. A semiparametric method for estimating the dependence parameters of copulas was proposed by Genest, Ghoudi and Rivest (1995), in...
Persistent link: https://www.econbiz.de/10005063630
to estimate the average effect of a binary treatment or policy on a scalar outcome. Identification typically exploits the … identification and estimation of treatment effects when observable covariates relevant to unconfoundedness are measured with error …
Persistent link: https://www.econbiz.de/10005063735
This paper investigates how conditional quantiles of a given distribution relate to each other. Given two conditional quantiles estimated nonparametrically, we investigate their relation by linking them through a parametric transformation. Asymptotic normality of the associated parameter vector...
Persistent link: https://www.econbiz.de/10005699609
The aim of this paper is to give a formal definition and consistent estimates of the extremes of a population. This definition relies on a threshold value that delimits the extremes and on the uniform convergence of the distribution of these extremes to a Pareto type distribution. The tail...
Persistent link: https://www.econbiz.de/10005699657
In order to forecast one-step ahead volatility, we calculated jump intensity by using estimated parameters of a duration model of price change. In this procedure, we do not assume any distribution on log-return. Although we do not make any distributional assumption, we may practically choose a...
Persistent link: https://www.econbiz.de/10005702699