When you run out of time, you sleep a little less and squeeze in a few more hours of work. Yet the effects of sleep on productivity are striking. Studies have repeatedly shown that when workers sleep less they become less motivated, make more errors, and zone out more often. One clever study demonstrated this by looking at the start and end of daylight savings time, nights on which, because of the time change, people lose sleep. It found that people spent 20 percent more time cyberloafing—searching the web for unrelated content—for every hour of lost sleep on those evenings. And that is just
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