Migrants at Sea: Unintended Consequences of Search and Rescue Operations* Claudio Deiana, Vikram Maheshri, Giovanni Mastrobuoni§ December 22, 2020 Abstract The Central Mediterranean Sea is the world's most dangerous crossing for irregular migrants. In response to mounting deaths, European nations intensified search and rescue operations in 2013. We develop a model of irregular migration to identify the effects of these operations. Leveraging plausibly exogenous variation from rapidly varying crossing conditions, we find that smugglers responded by sending boats in adverse weather and shifting from seaworthy boats to flimsy rafts. In doing so, these operations induced more crossings, ultimately offsetting their intended safety benefits. A more successful policy should restrict the supply of rafts and expand legal alternatives to irregular migration. Keywords: Central Mediterranean sea crossings, international, undocumented, irregular migration, search and rescue operations, rubber boats, deaths JEL codes: F22 (International Migration); H12 (Crisis Management). * We thank Cevat Aksoy, Samuel Bazzi, Giacomo Calzolari, Gordon Hanson, Tim Hatton, Andrea Ichino, Sandra Rozo and various seminar and conference audiences for their valuable feedback. Opinions expressed herein are those of the authors only and do not reflect the views of, or involve any responsibility for, the institutions to which they are affiliated. Any errors are the fault of the authors only. University of Cagliari,
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