What Do Laboratory Experiments Tell Us About the Real World

Abstract

An important question facing experimental economists is whether behavior inside the laboratory is a good indicator of behavior outside the laboratory. We begin with a model that assumes the choices that individuals make depend not just on financial implications, but also on the nature and extent of scrutiny by others, the particular context in which a decision is embedded, and the manner in which participants are selected. To the extent that lab and naturally-occurring environments systematically differ on any of these dimensions, the results obtained inside and outside the lab need not correspond. Based on theory and empirical evidence, we argue that lab experiments are a useful tool for generating qualitative insights, but are not well-suited for obtaining deep structural parameter estimates. We conclude that the sharp dichotomy sometimes drawn between lab experiments and data generated in natural settings is a false one. Each approach has strengths and weaknesses, and a combination of the two is likely to provide deeper insights than either in isolation.

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