By Deborah Liebart and Marco Manca .  Licensed under the CreativeCommons BY-NC-SA 4.0  DOI:  10.5281/zenodo.5111425 While public debts have increased drastically with the health crisis 1 , states are seeking to broaden their tax bases. It is in this context that the debate on antitrust laws and GAFAs is reopening in the United States but also in Europe through the national and supranational laws of the OECD 2 . The issue of antitrust and GAFAs has been debated at the G20 3 . Are unicorns turning into hydras? Could a regulatory policy re-stabilise the system?   " Giving hands " by afagen is licensed under CC BY-NC-SA 2.0   If the concept of the Smithian invisible hand as it is used today claims to naturally, spontaneously, settle monopolies, we have long discovered that without antitrust legislation, there is no natural equilibrium tending to fairly regulate the market. Competition is necessary for the economy to run smoothly in order to defend the interests of...