Considering the organization and patterns of markets and industries as the starting point for the analysis of economy, the main focus in this field is on the activities of two players: the firms and the state formulating industrial and public policy. The aim is to reveal the underlying causes of changes in corporate governance, corporate finance, firm size (including mergers), boundaries of the firms (innovation, internal production, outsourcing). Interfirm relations may be deeply influenced by public policies which we analyze in detail in every case. The studies are both theoretical and empirical, and are based on rigorous collection and examination of economic facts.