But the strategy worked, because United States agencies were allowed to proceed by trial and error, continually adjusting their policies over time in response not to ideology but to hard measurement of the results against societal goals.

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Because future prices are hard to predict, this yield measurement is only an estimation of return.

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But could careful measurement and management of sustainability also provide short-term, hard-nosed business advantages, especially when it comes to logistics?

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Consultants also shall provide full disclosure of any payments they receive from money managers, in hard or soft dollars, for any services they provide, including but not limited to, performance measurement, business consulting and education.

FORBES: Louisiana Mandating Consultant/Manager Disclosure (April 2, 2005)