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To be effective, legal rules need to incorporate a representation of human behavior that is as accurate as possible. In this regard, Behavioral Sciences offer useful insights, which the law can draw on helpfully. In this article, we present a scholarly movement which has developed over the past twenty years and provides ways to integrate behavioral insights in legal analysis and policy-making. We first make explicit the premises of behavioral legal analysis. We then discuss how the integrated study of law and behavioral sciences should be named (in French). Next, we define the scope of this interdisciplinary field of study by describing its objects and characteristic research questions. Finally, we give a brief overview of methodological issues. With this introduction to the behavioral analysis of law, we hope to draw more European legal researchers into the field.