Some industries, telecommunications, airlines, ... have become less concentrated. Finance certainly has. Also, the big trend is toward sprawling conglomerates to have stakes in all sorts of places. The big media corps. are obvious examples. Finally, with globalization, global concentration is probably increasing -- but data to back that up is unavailable, to the best of my knowledge.
On Wed, Mar 03, 2004 at 08:08:45PM -0500, John Mage wrote:
> apologies for header screw-up
>
> Doug responded:
>
> >> Just eyeballing it from a couple of recent world almanacs and one
> >> older one:
> >
> > According to Pankaj Ghemawat and Fariborz Ghadar's study of 40
> > industries ("The Dubious Logic of Global Megamergers," Harvard
> > Business Review, July-August 2000), there's been no trend towards
> > increased concentration in the post-WW II period.
>
> We've been over this here some years ago - my memory is that they
> excluded trade, finance, services etc etc AND that their methodology
> was inaccessible. Surely there's some accessible semi-official measure
> of concentration by sector, rather than this strange piece by BSchool types?
>
> john mage
>
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-- Michael Perelman Economics Department California State University Chico, CA 95929
Tel. 530-898-5321 E-Mail michael at ecst.csuchico.edu