And in overall composition we know immediately where we are (thank you, Big Ben) and what is going on.

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People choose different specialties and the number of males or whites or whatever choosing an occupation usually differs from the overall composition of the U.S. population.

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"The text of the Clean Air Act makes plain that Congress intended it as a measure to 'clean' the air of pollutants, not to alter the overall composition of the Earth's atmosphere, " argues the Alliance of Automobile Manufacturers, an auto industry lobbying group, in a brief.

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Mr Freeman finds that, in practice, employment-protection laws appear to have little effect on the overall level (as opposed to the composition) of employment.

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In these circumstances, a cheaper dollar will helpfully loosen overall monetary conditions, and also shift the composition of demand from consumer spending towards exports.

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The studies measured the participants' body mass index (BMI), a ratio of their height and weight, but it wasn't able to take into account their body fat composition, or how much of their overall body weight was made up of fat versus muscle.

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After the publisher and his managerial team overhauled the composition of the sales force and its operating philosophy, the paper saw overall revenue growth in 2011 and 2012.

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