 Policy analysis is thus linked both to the behavioral claim (Claim IV) and the design claim (Claim VIII). Neither of these links is logical or conceptual. The behavioral claim concerns the causal mechanism that determines how individuals respond to legal rules and institutions; these rules have effects through standard economic processes. The design aspect of policy analysis, however, requires not that the policymaker explain the effects of legal rules on behavior but that the policymaker predict the behavior the rules will induce. Prediction does not necessarily require the identification of a causal mechanism. Correlation suffices.