This volume contains the papers presented at the annual Concurrences Journal conference held on 21 February 2014 at the French Ministry for the Economy. After the traditional « State of the Union », presented by Vice President Joaquín Almunia in the context of the « after » economic crisis, the papers adress four main issues:• Detection of anticompetitive practices: Should existing tools be revised or new tools introduced? Leniency, market surveys, financial reward…• Patent...