El presente trabajo desarrolla una metodología de estimación de sistemas de demanda, que sirve para calcular la elasticidad crítica a utilizar en la definición de mercados relevantes dentro de un sector en particular, y para simular los efectos unilaterales de fusiones horizontales que...

This paper provides a formal theoretical framework for analyzing the sustainability of fiscal policy based on the government intertemporal budget constraint, and derives conditions that determine whether a fiscal stance is sustainable in the medium and long term. In contrast to previous studies,...

Bubble solutions of rational expectations models are identified by extra components that arise in addition to market fundamentals. In general there still exist many equilibrium paths relying on a minimal set of state variables, i.e., along which the number of lags that influence the current...

This paper investigates the sampling performance of hypothesis tests based on the fully modified vector autoregression (FM-VAR) that has recently been developed by Phillips (1995). The FM-VAR procedure is applicable without any prior knowledge about the number and location of unit roots. We...

This paper deals with hypothesis testing in vector autoregressive (VAR) models that may contain some unit roots. We consider situations in which the researcher's goal is not detecting the presence (absence) of unit roots or their location (i.e. cointegrating relations), but testing some economic...

We propose an empirical procedure, which exploits the conditional heteroscedasticity of fundamental disturbances, to test the targeting and orthogonality restrictions imposed in the recent VAR literature to identify monetary policy shocks. Based on U.S. monthly data for the post-1982 period, we...

This work examines the participation of the Portuguese economy in the ERM of the EMS based on some of the main predictions of the target zone literature. The exchange rate distribution reveals that the majority of the observations lie close to the central parity, thus rejecting one of the key...

This paper analyzes the dynamics of the US inflation series using two classes of models : structural changes models and Long memory processes. For the first class, we use the Markov Switching (MS-AR) model of Hamilton (1989) and the Structural Change (SCH-AR) model using the sequential method...

In this paper we deal with the problem of non-stationarity encountered in a lot of data sets coming from existence of multiple seasonnalities, jumps, volatility, distorsion, aggregation, etc. We study the problem caused by these non stationarities on the estimation of the sample autocorrelation...

The purpose of this paper is to study the self-similar properties of discrete-time long memory processes. We apply our results to specific processes such as GARMA processes and GIGARCH processes, heteroscedastic models and the processes with switches and jumps.