An effective understanding of business clusters and business incubators is important. Regional economic growth / development and strategies are also salient.
In our country it is just starting, employed by the premiere state university (Philippines). If you can find in my list of followers/following Njem -- a Malaysian researcher that focuses on business incubation models, you can find better answer.
In France we mainly have two running models for this purpose :
The "Poles de compétitivité" model which is the classical market oriented approach for regional economic growth
The "Poles Territoriaux de Cooperation Economique" model which is the new emerging approach which is more focusing on Ecology Social Impact and Democracy
Both are combining clusters and incubators.
You should find a lot of studies about those models.