We know very little about the performance of point optimal (PO) and approximate point optimal (APO) tests in the presence of unavoidable nuisance parameters. Because marginal likelihood based tests are said to perform well in the presence of unavoidable nuisance parameters, this paper compares...

Most studies on the link between health care expenditure (HCE) and GDP have been analyzed using data intensively from OECD countries, but little is known for other regions. The contribution of this paper is to present new results of several panel unit root and cointegration tests from 11 Asian...

One of the most infl?uential research ?fields in econometrics over the past decades concerns unit root testing in economic time series. In macro-economics much of the interest in the area originate from the fact that when unit roots are present, then shocks to the time series processes have a...

In regression we can delete outliers based upon a preliminary estimator and re-estimate the parameters by least squares based upon the retained observations. We study the properties of an iteratively defined sequence of estimators based on this idea. We relate the sequence to the Huber-skip...

The financial crisis of 2008 quickly spread from the USA to the world's major economies and might have impacted on the persistence of unemployment. This might happen because the crisis ushered in recession to every country affected and, in the aftermath, most countries have pursued austerity...

A Wald type test of the joint null hypothesis of linearity and nonstationarity within a threshold autoregressive process of order one with deterministic components is developed. Its limiting distribution is derived and its local power and finite sample properties investigated.

This paper tests for the presence of persistence in Indian industrial production. Persistence implies the existence of a unit root in the series. We therefore employ the augmented Dickey Fuller test as well as the Phillips Perron test. We also use the Bayesian framework which is superior to the...

SURGAT is a RATS menu-driven program to help in the analysis of the seasonal component and the trend of a (quarterly, monthly or annual) time series. Once the series is selected, a set of simple transformations may be applied: log, regular difference, seasonal difference, regular+seasonal...

This paper studies the behavior of the HEGY statistics for quarterly data, for seasonal autoregressive unit roots, when the analyzed time series is deterministic seasonal stationary but exhibits a change in the seasonal pattern. As a by-product we analyze also the HEGY test for the nonseasonal...

A novel procedure to test for unit root in a nonlinear framework is proposed by first introducing a new model – the MT-STAR model – which has similar properties as the ESTAR model but reduces the effects of the identification problem and can also account for cases where the adjustment...