Usain Bolt Has Another World Record
![](http://www.freakonomics.com/wp-content/uploads/2011/09/usainbolt-e1315311466925.jpg)
Usain Bolt has set another world record, this time with his Jamaican teammates in the 4 x100-meter relay. Bolt ran the anchor leg. A week earlier, Bolt false-started in the 100 final of the World Championships in Daegu, South Korea, an infraction that comes with the harshest of penalties: disqualification.
Check out our previous pieces on the statistical anomaly that is Usain Bolt by Justin Wolfers and Ian Ayres.
Usain Bolt: It’s Just Not Normal
Who’s the World’s Fastest Runner?
How Impressive is Usain Bolt? A Freakonomics Quiz
Usain Bolt is No Takeru Kobayashi
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