Economists often talk about ...

Economists often talk about the 80/20 Principle, which is the idea that in any situation roughly 80 percent of the work will be done by 20 percent of the participants. In most societies, 20 percent of criminals commit 80 percent of crimes. Twenty percent of motorists cause 80 percent of all accidents. Twenty percent of beer drinkers drink 80 percent of all beer. When it comes to epidemics, though, this disproportionality becomes even more extreme: a tiny percentage of people do the majority of the work.
Economists often talk about the 80/20 Principle, which is the idea that in any situation roughly 80 percent of the work will be done by 20 percent of the participants. In most societies, 20 percent of criminals commit 80 percent of crimes. Twenty percent of motorists cause 80 percent of all accidents. Twenty percent of beer drinkers drink 80 percent of all beer. When it comes to epidemics, though, this disproportionality becomes even more extreme: a tiny percentage of people do the majority of the work.
 Malcolm Gladwell

Quotes from the same author

My writing model is my mother, who is a writer as well. She always valued clarity and simplicity above all else. If someone doesn't understand what you're writing, then everything else you do is superfluous. Irrelevant. If any thoughtful, curious reader finds what I do impenetrable, I've failed.
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 Malcolm Gladwell
We vary greatly in the natural advantages that we've been given. The world's not fair
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 Malcolm Gladwell
We sometimes think of being good at mathematics as an innate ability. You either have "it" or you don't. But to Schoenfeld, it's not so much ability as attitude. You master mathematics if you are willing to try.
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 Malcolm Gladwell
That fundamentally undermines your ability to access the best part of your instincts. So my advice to those people would be stop thinking and introspecting so much and do a little more acting.
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 Malcolm Gladwell
You need to have the ability to gracefully navigate the world.
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 Malcolm Gladwell