Behavioural analysis studies how psychological variables affect economic outcomes. This course introduces to students the psychological processes and biases underlying decision-making with an emphasis on how to incorporate such insights into business, marketing, and investment strategies. It gives students a broad overview of fundamental results from various behavioural sciences that reveal how people make “irrational” decisions, in contrast to the rational expectations model underlying classical economic theories. It also provides students with practical advice about applying these findings to topics in marketing, management, and finance.