I do believe the literature part will help your question. 

http://www.sciencedirect.com/science/article/pii/S0278431916300901

I think the structure will depend on the unique strategy pursued by an organization! It all depends on contextual embeddement. 

It might be but both homegenuity an dhetroginuity are not stable during time of radical chnage. Which institutional conditions produce homoegenuse structure and which producess heterogeneous?.