Most analysts focus on Labour productivity, which is usually calculated by dividing total output by the number of workers, or the number of hours worked.

因此，许多分析人士着眼于劳动生产率，通常来讲就是用总产出除以全部的劳动人口或者劳动时间来计算。

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Since carbon dioxide enhances photosynthesis, some scientists have calculated that higher concentrations in the atmosphere would increase the productivity of crops and forests.

由于二氧化碳能促进光合作用，所以一些科学家估计大气中二氧化碳含量的增加会提高庄稼的产量并且促进森林生长。

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Labor productivity is calculated by added value at current price.

社会劳动生产率按现价增加值计算。

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The other half are being deployed by organizations who have calculated that the productivity gains from equipping executives, salespeople, business analysts and others with iPads outweigh the inability to lock them down with hundreds of group policies, the typical overkill on a corporate PC.

FORBES: iPad 2 Will Continue Enterprise Invasion Despite Delivering Zilch For Them

Moreover, each of these measures can be calculated in two ways: total productivity and first-author productivity.

ECONOMIST: Peer review