The authors of the monograph consider the aspects of digital economy development and establishing new legal relations, implementation of the state policy legislation for competition development in high-tech economy sectors. Main trends are outlined for further development of Russian and foreign legislation in the sphere of regulating digital economy. The collective monograph includes research works contributed by the participants of the international round table “Legal regulation of digital economy: yesterday, today, tomorrow” hosted by the editorial of “Law and and digital economy” journal issued by Kutafi n Moscow State Law University (MSAL) Research Council on February 22, 2019.