Thinking and Deciding
FourthEdition
Jonathan Baron
University of Pennsylvania

Beginning with its first edition and through three subsequent editions, Thinking and
Deciding has established itself as the required text and important reference work for
students and scholars of human cognition and rationality. In this, the fourth edition,
Jonathan Baron retains the comprehensive attention to the key questions addressed
in the previous editions — How should we think? What, if anything, keeps us from
thinking that way? How can we improve our thinking and decision making? — and
his expanded treatment of topics such as risk, utilitarianism, Bayes’s theorem, and
moral thinking. With the student in mind, the fourth edition emphasizes the devel-
opment of an understanding of the fundamental concepts in judgment and decision
making. This book is essential reading for students and scholars in judgment and
decisionmakingandrelatedfields,includingpsychology,economics,law,medicine,
and business.
Jonathan Baron is Professor of Psychology at the University of Pennsylvania. He is
the author and editor of several other books, most recently Against Bioethics.Cur-
rentlyheiseditorofthejournalJudgmentandDecisionMakingandpresidentofthe
Society forJudgment and Decision Making (2007).