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The aim of the Econ-ARK project is to make it easier for social scientists to do 'structural modeling' of economic choice behavior by providing a well-documented, open source codebase containing the core techniques in a way that can be relatively easily adapted to address many different questions in both macro- and microeconomics. 'Structural' modeling of economic choices aims to identify the logic or reasons behind observed behavior, rather than just describing that behavior statistically.