The transformations induced by the process of “modernisation”, including in its substantive dimension, as well as recent judgments by the EU Courts, have left many lawyers and economists wary as to the standards actually governing findings of antitrust infringement under EU competition law, thereby affecting their ability to advise businesses effectively on the design of their commercial practices.<br />While not ignoring institutional constraints, this volume revisits the notion of restriction of competition in the framework of Articles 101 and 102 TFEU with a view to taking stock of recent developments, to identifying common trends and to informing the application of core EU antitrust principles in current market contexts.<br />Associating lawyers and economists, practitioners and academics, it seeks both to revisit long-standing theories of harm to competition and to explore novel forms of antitrust concerns.