Dr. Drago Kos is the associate professor for spatial sociology and social ecology at the Faculty of Social Sciences, University of Ljubljana. He also participates in graduate and postgraduate programmes at the Faculty of Architecture, Faculty of Civil Engineering and Geodesy, Biotechnical Faculty and the Academy of Fine Arts. He’s the chair of the Centre for Spatial Sociology at the Faculty of Social Sciences. In 1996 to 1998 he was the president of the Slovenian Sociological Association and the board member of the Research Committee for Urban and Regional Development of the International Sociological Association. Important publications: Rational non-formal spaces, Ljubljana, 1993; Practical sociology, Ljubljana, 2002; Transitional Informal - formal cohabitation. In: Reconciling Economy and Society. OECD, Paris, 1996; Three levels of sustainable development. Theory and Practice, XLI, 1-2, Ljubljana, 2004