Business & strategy laws · law 009
Cobra Effect
Also known as: Perverse incentive
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
what it means
An incentive meant to solve a problem makes it worse because people find a way to profit from the problem itself.
How Cobra Effect works
The cobra effect is a sharp version of Goodhart's law: the reward is attached to something people can manufacture. Instead of reducing the problem, the incentive creates a market for it.
In business it shows up in bonuses, discounts, and partner schemes that reward activity which can be faked or inflated.
where it comes from
German economist Horst Siebert coined the term, after a widely told (and loosely documented) story of a bounty on dead cobras in colonial Delhi that led people to breed cobras. A better-documented case is the 1902 rat bounty in Hanoi, where people cut off rat tails and released the rats to breed.
Cobra Effect examples in business
Referral schemes
A fintech pays ₹500 per sign-up and gets thousands of fake accounts created by the same few people.
Bug bounties inside a team
Paying developers per bug fixed can tempt people to ship bugs they later fix.
Dealer targets
Dealers rewarded on units sold to them push stock into the channel that never sells through to customers.
How to apply it
- 1For any incentive, ask: can someone earn this by creating the problem or faking the result?
- 2Reward the final outcome (paying customer retained 90 days) rather than an easy-to-fake activity.
- 3Cap, audit, or delay payouts until results are verified.
- 4Watch for sudden spikes that look too good — they often are.
common misreading
Incentives still work; the lesson is to tie them to outcomes that are hard to game.
ask yourself
Could anyone make money from your current incentive without actually helping the business?
put it into practice
Frequently asked questions
What is Cobra Effect?
An incentive meant to solve a problem makes it worse because people find a way to profit from the problem itself. The cobra effect is a sharp version of Goodhart's law: the reward is attached to something people can manufacture. Instead of reducing the problem, the incentive creates a market for it.
Who came up with Cobra Effect?
German economist Horst Siebert coined the term, after a widely told (and loosely documented) story of a bounty on dead cobras in colonial Delhi that led people to breed cobras. A better-documented case is the 1902 rat bounty in Hanoi, where people cut off rat tails and released the rats to breed.
How do you apply Cobra Effect in business?
1. For any incentive, ask: can someone earn this by creating the problem or faking the result? 2. Reward the final outcome (paying customer retained 90 days) rather than an easy-to-fake activity. 3. Cap, audit, or delay payouts until results are verified. 4. Watch for sudden spikes that look too good — they often are.
What is a common misunderstanding of Cobra Effect?
Incentives still work; the lesson is to tie them to outcomes that are hard to game.