LUISS University DASS - DaSC Scientific Paper Data Analysis for Social Sciences & Demography and Social Challenges LUISS University Inquiring the differential effects of low-, medium- and high- skilled immigration on market productivity and efficiency: evidence from 21 Italian sub-national labour markets. Alessandro Tamburrini, Claudia Del Forno, Federico Tedeschi, Michele La Bella, Nina Goracci, Rocco Introcaso A R T I C L E I N F O Keywords: Low-skilled immigration Medium-skilled immigration High-skilled immigration Revenues Gross internal remuneration Employment Production Market Sector Wordcount: Appendix: 1912 Article: 5436 A B S T R A C T This paper seeks at unpacking the correlation patterns among stocks of immigrants, based on the assumption that immigrants are perfectly employed depending upon their education and abilities, on regional labour markets. The authors decided to divide stocks of immigrants into low, medium and high cohorts, where they respectively enjoy low- , medium-, and high-skilled intensive work placements. More specifically, we study the effects of the various immigration stocks on (i) firms’ revenues, (ii) gross internal remuneration, (iii) value of production, and (iv) and employment figures, all by sector. Interestingly but not surprisingly enough, we discovered that when it comes to employment and production measures, the medium- and high-skilled immigrant sub-populations behave similarly. Additionally, the authors demonstrate that increases in medium and high stocks are linked to higher production levels but lower employment levels. Further, contrary to the medium-skilled cohort, a boost in the high-skilled stock is associated to an increase in gross domestic pay. On the other hand, the low-skilled sub-sample corresponds with increased employment and lower production and, as for the medium cohort, to a decline in gross domestic remuneration. The authors finally suggest further statistical modelling and research approach in order to deepen and enlarge the analytical scope of the research question.