Experimental Economics: Economic and Game Theoretic Principles in Experimental Research in the Social Sciences

Understanding individual and social decisions and how they are affected by the environment and institutional constraints is at the heart of the the social sciences. With the exception of psychology, traditionally in the social sciences empirical evidence is gathered via happen- stance data. Such data are plagued with endogeneity problems and unobserved variables which make it difficult to draw causal inferences and reliably test theories. In the last thirty years laboratory experiments are increasingly adopted, especially in economics. Experimen- tal economics research is often based on formal economic or game theoretical models with clear-cut rules which allow unambiguous inferences from changes in environmental variables. This model-based approach is tightly linked to two principles of experimental economics: the use of task related (monetary) incentives and the proscription of deception. Experimental economics plays an important role in theory and model falsification as well as in digging up behavioral regularities in individual and interactive decision making. Research in exper- imental economics was instrumental in the development of new models of other-regarding preferences, boundedly rational reasoning, adaptive learning, and ‘noisy’ equilibrium models. The toolbox of economics experiments informs research in decision neuroscience and is also applied in many other fields of the social sciences. Undoubtedly, experimental economics will continue to challenge newly emerging models and suggest new theories of human behavior and keep on to significantly contribute to knowledge in the social sciences.