The paper surveys different approaches to the estimation of the underground economy. First, the focus is on the methodologies adopted by the Italian and French Statistical Institutes, respectively based on the exhaustive estimate of the labour input and on tax compliance data. Secondly, we...

Many ways exist to measure and model financial asset volatility. In principle, as the frequency of the data increases, the quality of forecasts should improve. Yet, there is no consensus about a "true" or "best" measure of volatility. In this paper we propose to jointly consider absolute daily...