Today, in a short commentary written for Radiocor/IlSole24Ore, I discuss the issue of migrant flow into Europ and its impact on the economy of the host country. Everyone asks the question “Do migrants bring positive or negative benefits to the receiving country?”. The short answer is it depends on a number of variables and generalisation across the globe would be mis-leading. However, narrowing the focus on the Mediterrenan migrant flow into Italy, one can almost certainly affirm that in the short term, the impact is negative and that in the long term it is, at best unclear. The impact may potentially be positive only under a strict set of assumptions, that need to be carefully analysied before making irreversible decisions.