Approximate entropy (ApEn) has been widely used as an estimator of regularity in many scientific fields. It has proved to be a useful tool because of its ability to distinguish different system’s dynamics when there is only available short-length noisy data. Incorrect parameter selection...

The growth rates of wages, unemployment and output of a number of OECD countries have a strongly skewed distribution. In this paper we analyze to what extent downward wage rigidities can explain these empirical business cycle asymmetries. To this aim, we introduce asymmetric wage adjustment...

Starting from a new continuous-time non-linear dynamic model of the exchange rate, we formally show that the introduction of a Tobin tax reduces speculators’ prot and inuences the dynamics of the system making it more stable and less prone to chaotic motion.