Abstract
By exploring the consequences of imperfect information, R. Douglas Arnold and John Mark Hansen (both intellectual descendants of David Mayhew) make significant contributions to the rational-choice theory of legislator decision-making. Indeed, their books can be usefully understood as the latest stage in the evolution of that theory. Ultimately, however, their contributions to the theory are incomplete. While Arnold and Hansen both highlight an insufficiently emphasized issue, their particular arguments concerning the implications of imperfect information leave unanswered several important questions.
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