Who said anything about benefits? I think the heavy breathing about it is way overdone, and the theoretical arguments against it aren't very persuasive. If there's a left position on institutional arrangements in finance, I think it'd be to create public and cooperative institutions capitalized through a tax on the big guys. Doug
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Another little point: separating banking from investment
via regulation is not the same as reducing concentration,
tho there could be some relationship.
mbs