Exogenous shocks may lead to policies that seem extreme and even “irrational”. This paper argues that, in the event of a major energy shock in the US that persists, such legislation is an inevitable response to the demand from constituents that political actors “do something”. Since shocks by their nature are unanticipated and are often highly technical and complex, boundedly rational legislators cannot generally understand all of the ramifications of the shock, much less hope to craft well-considered and precise legislation to deal with it. But the demand to “do something” means that a range of actions is politically necessary. The “shock” policy process is modelled as a stepwise legislative decision problem. If the crisis persists, legislation that promises a solution is likely to be the result, even if this “solution” is infeasible. The model is applied to five US energy shocks.
