ABSTRACT
The five case studies that follow explore the central hypotheses outlined in Chapter 4. We ask whether the experience of the market in question supports the argument that radical change incompatible with prevalent corporate visions is deconcentrating, while incremental (albeit very rapid) change compatible with such visions is concentrating. Are these useful hypotheses to interpret the evolution of the market in question? As the concept of vision is hard to pin down in quantitative terms, and as some key data here were not available to us, what follows in these cases is not detailed econometric analysis. Rather, it is a preliminary attempt to see whether the history of these markets is broadly supportive of the arguments advanced above.
