For instance, in 2002 Moody's acquired KMV, the global leader in provision of objective and quantitative credit risk assessment tools.

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Moody 's ( MCO - news - people ) acquired KMV, the global leader in provision of objective and quantitative credit risk assessment tools.

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The key difference is that clinical trials are much more rigorous, and as much as possible rely on objective, quantitative analysis to measure improvement, as opposed to field trials, which are more reliant on patients' subjective reactions.

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