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AbstractThis paper develops a theory of focusing and framing in an intertemporal context with risky choices. We provide a selection criterion between existing theories of focusing by allowing a decision maker to choose her frame such that her attention is either drawn to salient events associated with an option or to the expected utilities an option yields in different time periods. Our key assumption is that a decision maker can choose her frame in a self-serving manner. We predict that the selected frame induces overoptimistic actions in the sense that subjects underrate downside risk but overrate upside risk and accordingly reveal overoptimistic choices. Hence, our theory can explain phenomena such as excessive harmful consumption (smoking, unhealthy diet) and risky investments (entrepreneurship, lotteries, gambling) in one coherent framework. Notably, overoptimistic actions are not universal, but have plausible limits. We characterize under which situations overoptimistic actions are most likely to occur and under which circumstances choices should be rational or even pessimistic.JEL Classification: D03, D11, D90 Keywords: Focusing, Salience, Framing, Overoptimism. * We are grateful to the editor, three anonymous referees, Sophie Bade, Pedro Bordalo, Claudia Cerrone, Botond Kőszegi, Paul Heidhues, Nicola Gennaioli, Adam Szeidl, and Achim Wambach for their helpful suggestions. We also thank participants of the workshop on "Limited Attention" in Copenhagen, of the annual conference of the Verein für Socialpolitik in Münster, of the "Spring Meeting of Young Economists" in Ghent, and of the annual meeting of the EEA in Mannheim, as well as seminar participants in Bath, Cologne, Düs-seldorf, and at the Royal Holloway College for their helpful comments. In addition we are grateful to Mats Köster for research assistance. †