Likewise, automation should eventually boost productivity, stimulate demand by driving down prices, and free workers from hard, boring work.

同样，自动化最终应该提高生产力，通过降低价格来刺激需求，并把工人从繁重、乏味的工作中解脱出来。

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Measuring knowledge worker productivity is hard at the best of times

很多时候，要度量知识工作者的工作效率是很困难的。

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Despite these challenges, thanks to the productivity and hard work of the American people, our economy is expanding at a healthy pace.

WHITEHOUSE: Testimony of Director Bolten

Despite obvious enormous advantages to customers, evolutionary gains in productivity are hard to achieve at scale with such barriers (disclosure: the author was part of the team that initially brought Virtuwatt to market).

FORBES: The Economist: Innovation Almost Dead. Perhaps Not So In Electricity

Productivity in the public sector is hard to measure and often poor.

ECONOMIST: A lost opportunity