DEFINING SOCIAL ENTREPRENEURSHIP: LESSONS FROM PORTUGUESE ORGANIZATIONAL DYNAMICS Tenth International Conference of the International Society for Third-Sector Research Siena, July 13th, 2012 Cristina Parente Assistant Professor in Department of Sociology. Researcher at the Institute of Sociology. Faculty of Arts - University of Porto (ISFLUP/UP). E-mail: cparente@letras.up.pt Alexandra Lopes Assistant Professor in Department of Sociology. Researcher at the Institute of Sociology. Faculty of Arts - University of Porto (ISFLUP/UP). E-mail: aslopes@letras.up.pt Vanessa Marcos PhD student on a fellowship research program at the Institute of Sociology. Faculty of Arts – University of Porto (ISFLUP/UP). E-mail: vanessa.c.marcos@gail.com Social Entrepreneurship in Portugal: the politics, the organizations and the education/training practices (PTDC/CS-SOC/100186/2008) E-mail: empresoc@gmail.com Web site: www.empsoc.net http://www.facebook.com/empsoc