Sonderforschungsbereich 504 is an interdisciplinary research group combining economists with social psychologists. This glossary provides well-written short articles in English on the basic concepts of economics and econometrics, as well as the psychology of decision making and social judgement. Covers most of the 'heuristics and biases' causing deviations from rational choice, e.g. availability, representativeness, risk aversion, anchoring-and-adjustment. Also covers behavioural finance, game theory, experimental economics, auction theory; and applications to life-cycle savings decisions.