Millán Díaz (PhD students, Organizational Economics, Universidad de Zaragoza) is Assistant Professor in the Department of Business Organization at the Universidad de Zaragoza where he teaches the subject of “Foundations of Economic of the Firm”. He studied his degree in Business Administration at the University of La Rioja and his bachelorship organized by the International Baccalaureate Organization. His current research is focus on the following themes: Organizational behavior of firms of the market-side Social Economy, factors for the emergence of cooperative societies, economic impact of cooperatives and social and collective entrepreneurship.