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Extract :
Many of life’s decisions are hard. What kind of career should you pursue? Does your ailing mother need to be put in a nursing home? You and your spouse already have two kids; should you have a third?
Such decisions are hard for a number of reasons. For one, the stakes are high. There’s also a great deal of uncertainty involved. Above all, decisions like these are rare, which means you don’t get much practice making them. You’ve probably gotten pretty good at buying groceries, since you do it so often, but buying your first house is another thing entirely.
Some decisions, meanwhile, are really, really easy.
Imagine you’ve gone to a party at a friend’s house. He lives only a mile away. You have a great time, perhaps because you drank four glasses of wine. Now the party is breaking up. While draining your last glass, you dig out your car keys. Abruptly you conclude this is a bad idea: you are in no condition to drive home.
For the past few decades, we’ve been rigorously educated about the risks of driving under the influence of alcohol. A drunk driver is thirteen times more likely to cause an accident than a sober one. And yet a lot of people still drive drunk. In the United States, more than 30 percent of all fatal crashes involve at least one driver who has been drinking. During the late-night hours, when alcohol use is greatest, that proportion rises to nearly 60 percent. Overall, 1 of every 140 miles is driven drunk, or 21 billion miles each year.
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SUPER FREAKONOMICS
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