The aim of this paper is to explore the use of administrative data to study the choices of firms relating to the utilization of regular and irregular workers. The data are collected by the INPS (National Social Security Administration) during inspection activity aimed to catch irregular workers...

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...