changed:
-
This typology breaks down the traditional boundaries between the nonprofit 
and private sectors and draws definition to this new institutional animal--part 
business-part social--the social enterprise. In doing so, the typology explores 
how institutions have combined a mix of social values and goals with 
commercial business practices and how they have come up with ownership models, income and capitalization strategies, and unique management and 
service systems designed to maximize social value. The illustrative typology 
classifies different models of social enterprise in order to navigate readers 
through the currently ill-defined, diverse and dynamic landscape of this 
emerging field. 

Kim Alter, Social Enterprise Typology, 2005.  

http://www.virtueventures.com/setypology.pdf