The “Cobra Effect”: When a Reward Backfires
A policy can make a problem worse when it rewards people for producing evidence of the problem rather than for reducing the problem itself. This unintended result is known as the cobra effect, named for a widely repeated story about a bounty offered for dead cobras in colonial India. The story says some people began breeding cobras to collect the reward; when the bounty ended, they released the snakes, leaving more cobras than before.
The label captures the incentive problem, whether or not every detail of the often-told story is taken literally. A bounty changes the payoff: catching a snake earns money, but breeding one may also become profitable. The policy’s success then depends on an assumption—that people can claim rewards only by removing snakes they did not create.
How a Helpful Measure Can Reward the Wrong Outcome
This is a case of perverse incentives: a reward encourages behavior that works against the goal it was meant to serve. The same risk appears when officials pay for reports, counts, or visible outputs that are only rough substitutes for the desired result. Once money is attached to a measure, people may find ways to improve the measure without improving the underlying situation.
That does not mean cash incentives are inherently ineffective. It means their design matters. A program can reduce the risk by checking where eligible claims come from, watching for suspicious changes in supply, and measuring whether the original problem is actually shrinking—not just how many claims are submitted. A bounty is useful only if the route to earning it leads toward the outcome the government wants.
