This is the first definitive introduction to behavioral economics aimed at advanced undergraduate & postgraduate students Authoritative cutting edge yet accessible it guides the reader through theory & evidence providing engaging & relevant applications throughout It is divided into nine parts & 24 chapters Part I is on behavioral economics of risk uncertainty & ambiguity The evidence against expected utility theory is examined & the behavioral response is outlined; the best empirically supported theory is prospect theory Part II considers other-regarding preferences The evidence from experimental games on human sociality is given followed by models & applications of inequity aversion intentions based reciprocity conditional cooperation human virtues & social identity Part III is on time discounting It considers the evidence against the exponential discounted utility model & describes several behavioral models such as hyperbolic discounting attribute based models & the reference time theory Part IV describes the evidence on classical game theory & considers several models of behavioral game theory including level-k & cognitive hierarchy models quantal response equilibrium & psychological game theory Part V considers behavioral models of learning that include evolutionary game theory classical models of learning experience weighted attraction model learning direction theory & stochastic social dynamics Part VI studies the role of emotions; among other topics it considers projection bias temptation preferences happiness economics & interaction between emotions & cognition Part VII considers bounded rationality The three main topics considered are judgment heuristics & biases mental accounting & behavioral finance Part VIII considers behavioral welfare economics; the main topics are soft paternalism & choice-based measures of welfare Finally Part IX gives an abbreviated taster course in neuroeconomics