But after careful analysis, we've determined that neither goes far enough to warrant the substantial new investments that these companies are requesting.

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Dempsey said Thursday's announcement would be implemented "over time and with careful analysis, " but he added that the service chiefs were unanimous in their support for the move.

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But there has been very little careful analysis.

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It is the ability it gives a few large firms to control the market for short periods of time, sucking investors into positions, or driving them out, not based on careful thought or analysis, but in emotional reaction to a sudden temporary intraday rally created by a wave of buy programs, or a sudden intraday decline created by a wave of sell programs.

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But her passionate advocacy gets in the way of careful analysis.

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But before we conclude that markets failed, we need a careful analysis of public policy's role in creating this mess.

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