>And what do you say on the predation thing?

I'm not sure. I wouldn't be surprised if it was true, but I don't think you need any 
predation to explain why new entrants would be very unstable and have low survival 
rates in a market with significant economies of scale but no effective barriers to 
entry. Simple competition between the new entrants could be enough to explain their 
failure. But I don't know the facts well enough to know that that is the explanation. 
-- Bill Dickens

William T. Dickens
The Brookings Institution
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