systems of differentiation
Differentiation as a concept should be distinguished from the concept of diversity. Diversity is a term indicating the variety of entities within a system. While differentiation denotes a dynamic process, diversity refers to a static situation. Differentiation is the process in which new entities in a system emerge; diversity refers to the variety of the entities at a specific point in time (Huisman, 1995, p. 51). The framework to be presented will be directed to differentiation and diversity of