The Cobra Effect describes a class of interventions that worsen the problem they were designed to solve, due to perverse incentives or behavioral adaptations. Named after the apocryphal story of cobras bred for British-colonial bounties in India, it is a specific and important category of unintended consequences where the solution directly causes the problem to intensify.
Second Order Effects are the indirect consequences of an action that occur as a result of the first-order effects. While first-order effects are often obvious and intended, second-order effects are frequently unexpected, larger in magnitude than the initial action, and sometimes work directly against the goals of the original intervention. Thinking in orders of effect is essential for policy design, product decisions, competitive strategy, and investment analysis.
Unintended Consequences is a social science principle β formalized by Robert Merton in 1936 β describing how purposeful actions regularly produce outcomes their designers did not intend and often did not anticipate. Unintended consequences can be beneficial (penicillin discovered while studying bacteria), neutral, or harmful (prohibition creating organized crime). Understanding the mechanisms that generate them is the key to better policy, product, and strategic design.