The problem of testing a set of restrictions R(q)=0 in a complex hierarchical model is considered. We propose a different approach from the standard PO ratio test, which can be viewed as the Bayesian analogous to the classical Wald type test. With respect to the PO ratio, it has the advantage of...

We propose to use a time-varying coefficient model to measure contagion. The proposed measure works in the joint presence of heteroskedasticity and omitted variables. It requires knowledge of the source of the crisis but not its timing. The estimation procedure is Bayesian and is based on Markov...

Nonlinearly mean-reverting models can explain the high short-term volatility ofthe real exchange rate and the slow speed of adjustment to the equilibrium level. Anonlinearly mean-reverting model is used in this paper to fit to euro-dollar realexchange rate. This model implies that near...

In this paper we compare the results of applying two different approaches to the determination of real exchange rates. The first approach is based on relative fiscal impulses, as defined by the IMF, that account for demand shocks and was implicitly proposed by Obsfeld (1985). For the second...

Recent research has reported the lack of correct size in stationarity test for PPP deviations within a linear framework. However, theoretically well motivated nonlinear models, such as the ESTAR, appear to parsimoniously fit the PPP data and provide an explanation for the PPP ¿puzzle¿....

The aim of this paper is to analyse the empirical fulfilment of PPP in a number of Central and Eastern European countries. For this purpose we apply two different unit root tests in order to control for two sources of nonlinearities, i.e. Bierens (1997) and Kapetanios, Shin and Snell (2003). We...

Nonlinear models of deviations from PPP have recently provided an important, theoretically well motivated, contribution to the PPP puzzle. Most of these studies use temporally aggregated data to empirically estimate the nonlinear models. As noted by Taylor (2001), if the true DGP is nonlinear,...

The aim of this article is to provide additional evidence on the fulfilment of the Purchasing Power Parity hypothesis in the so-called Mediterranean countries. In order to test for the empirical validity of such hypothesis, we have applied two types of unit root tests. The first group is due to...