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The Cobra Effect: When Incentives Backfire Spectacularly
💡 The cobra effect shows that people respond to incentives as designed, not as intended — any incentive system will be gamed unless stress-tested against creative exploitation.
During British colonial rule of India, the government was concerned about the number of venomous cobras in Delhi. Their solution seemed logical: offer a bounty for every dead cobra brought in. At first, it worked — people killed cobras and collected rewards. But then enterprising citizens realized they could breed cobras to collect more bounties. When the government discovered this and scrapped the program, the breeders released their now-worthless cobras into the wild. The cobra population ended up larger than before the program started.
This is the cobra effect: when an incentive designed to solve a problem makes it worse. And it happens with alarming frequency. When Hanoi, Vietnam offered a bounty on rat tails, people started cutting tails off live rats and releasing them to breed more. When a daycare in Israel started fining parents for picking up children late, late pickups increased — parents treated the fine as a fee that relieved their guilt.
The lesson isn't that incentives don't work — it's that people respond to the incentive you actually create, not the one you intended. Every incentive system is a game, and humans are extraordinarily creative at finding exploits. The best incentive designs are those that have been stress-tested against the question: "How could someone game this?"