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“Mostly, as any of us go through our lives, we don’t need to maximize the number of decisions we make per day,” Bezos explains. “Making a small number of key decisions well is more important than making a large number of decisions. If you shortchange your sleep, you might get a couple of extra ‘productive’ hours, but that productivity might be an illusion.”

Your work can suffer when you’re tired. “When you’re talking about decisions and interactions, quality is usually more important than quantity,” he says.

Science is on Bezos’ side. Researchers for the Harvard Business Review found a link between adequate sleep and effective leadership, pointing out that all four of the most common leadership behaviors associated with high-performing teams were hindered by a lack of sleep.

One study found that after being awake for more than 17 to 19 hours, participants’ performance slipped to that of someone with a blood alcohol content of 0.05 percent. For reference, in many U.S. states the legal BAC is 0.08 percent.

While other successful business magnates, including Arianna Huffington and Bill Gates, join Bezos in making sleep a priority, there’s another camp of successful people who do the opposite.

PepsiCo CEO Indra Nooyi typically clocks only around four hours a night and Twitter and Square CEO Jack Dorsey’s packed schedule leaves him between four and six hours a night. President Donald Trump wrote in his 2004 book “Think Like a Billionaire” that he sleeps just four hours per night.

But for most people, it seems, forgoing sleep, like trying to multitask, doesn’t pay off.

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