Cobra Effect

 Human beings react to every rule, regulation, and order governments impose, and their reactions result in outcomes that can be quite different than the outcomes lawmakers intended.

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The Cobra Effect: Lessons in Unintended Consequences | Antony Davies, James R. Harrigan

Unintended consequences happen so often that economists call them “Cobra Problems,” after a famous historic example. In colonial India, Delhi suffered a proliferation of cobras. To cut the number of cobras, the local government placed a bounty on them. Can you guess what happened?