After a first part designed to deliver shortly some relevant microeconomic issues, which students should know (demand elasticity, cost curves, profit maximazation, efficiency, the theory of the firm, game theory) and to analyze monopoly (with particular attention to regulation), perfect competition and monopolistic competition more deeply than in a first course in Microeconomics, the rest of the course is dedicated to oligopoly (traditional theoretical models, collusion, power of market), to price strategies and not-price strategies (price discrimination, product differentiation, advertisement), to entrance in and exit from the market (with and without strategic behavior), to the role of R&D.