We test whether the Nelson and Siegel (1987) yield curve model is arbitrage-free in a statistical sense. Theoretically, the Nelson-Siegel model does not ensure the absence of arbitrage opportunities, as shown by Bjork and Christensen (1999). Still, central banks and public wealth managers rely...

We consider a small structural model to describe the transmission mechanism of monetary policy and the dynamics of inflation. We first verify the validity of the general structure estimating it for Germany which represents a sort of benchmark model. At least one of the links required for the...

The CEEC are approaching the accession to the EU with a variety of exchange rate regimes. The authors find that these differences depend on economical factors as well as on the history of the countries. For that purpose, they discuss the role of the exchange rate in the stabilization of the...

Lobato and Robinson (1998) develop semiparametric tests for the null hypothesis that a series is weakly autocorrelated, or I(0), about a constant level, against fractionally integrated alternatives. These tests have the advantage that the user is not required to specify a parametric model for...

We consider changes in the degree of persistence of a process when the degree of persistence is characterized as the order of integration of a strongly dependent process. To avoid the risk of incorrectly specifing the data generating process we employ local Whittle estimates which uses only...