E Marketplaces Face A Bloodbath

There are 600 sites to link buyers and sellers. But two per industry is plenty

Is it just me, or does it seem as if somebody announces a new online marketplace about every three seconds? In the past few weeks, countless companies--from General Motors and DuPont to Sears Roebuck and Sabre--have announced Web sites to connect buyers and sellers. They clearly hope to recreate the incredible growth and fast profits of eBay Inc., the consumer auctioneer that proved the power of e-marketplaces.

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