This text merges behavioural decision research into the organizational context by providing managerial examples and examining judgement. The book provides research insights in an accessible format, and does not require or assume advanced knowledge of statistics, psychology, decision-making or economics. Frequent use of counter-intuitive quizzes highlight what can go wrong in the readers judgment, and use of real-world stories such as Phar-Mor should help students understand the theory by seeing how it is applied. Chapter 10 summarizes and focuses on how to make changes, as suggested throughout the book - a lasting part of the reader's decision-making processes, and evaluates strategies for improving one's judgement. The book should help student understanding by first introducing the micro perspective (chapters 2-6) and then building on this base when introducing multi-party contexts (chapters 7-9).