This paper proposes similar unit root testing procedures for both homogenous and heterogeneous dynamic panel data models, based on least squares estimates and assuming that the time dimension of the panel data is fixed. It is shown that the limiting distribution of the tests id standard normal.

We present a version of the exchange-rate regime model of inflation. We then use quarterly data from Mexico during 1946.I-1995.I to test and estimate a simultaneous equation model for wage inflation, price inflation and industrial produciton. In doing so, we respect the Lucas critique and take...

This paper considers regression-based test criteria for the hypothesis of conditional variance nonstationary in the logarithmic family of GARCH processes. The tests are based on teh ARMA representations that appropriate nonlinear transformations of GARCH-type processes admit. Simulation...

We show that in a purely nonstationary Vector Autoregression (VAR), the biases of Maximum Likelihood and Least Squares Estimators are asymptotically proportional to the dimension of the system, even when the equations and regressors are generated independantly of each other. When some stable...

This paper questions the widespead practice of assessing the hypothesis of long-run fiscal policy sustainability by means of conventional unit-root tests that do not allow for the possible impact of regime shifts. Using the Greek economy as a model case, the Zivot- Andrews squential...

This paper examines the persistence of the volatility of the risk premia for excess holding period returns of the term structure using a GARCH-M model of the conditional variance. The finding of a high degree of persistance cannot be sustained once allowance is made for a structural break in the...

This paper presents new evidence about the information contained in the term structure about future inflation. Although the general finding in the literature is that the greater the time horizon the more information the term structure possesses about inflation, in this paper we show that the...

In this paper we introduce a unit root test for dynamic panel data models, allowing for cross-sectional heteroscedasticity and serial correlation in the disturbance term. The limiting distribution of the test statistic is derived under the assumption that the time dimension of the panel is...

This paper introduces a new model of structural breaks in the coefficients of economic relationships which allows them to be driven by large past economic shocks. The breaks generated by these shocks can be taken to reflect stochastic changes in agents' decisions or beliefs triggered by...