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Human-dominated marine ecosystems are experiencing accelerating loss of populations and species, with largely unknown consequences. We analyzed local experiments, long-term regional time series, and global fisheries data to test how biodiversity loss affects marine ecosystem services across...
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Skilled workers emigrate from developing countries in rising numbers, raising fears of a drain on the human and financial resources of the countries they leave. This paper critiques existing policy proposals to address the development effects of skilled migration. It then proposes a new kind of...
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Countries restrict the overall extent of international travel and migration to balance the expected costs and benefits of mobility. Given the ever-present threat of new, future pandemics, how should permanent restrictions on mobility respond? A simple theoretical framework predicts that reduced...
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the extent of African health workers' international movements. We use destination-country census data to estimate the …-born physicians in the world, and about one tenth of African-born professional nurses. The fraction of health professionals abroad …
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raise sending-country and global welfare. This study uses a new database of health worker emigration from Africa to test … whether exogenous decreases in emigration raise the number of domestic health professionals, increase the mass availability of … basic primary care, or improve a range of public health outcomes. It identifies the effect through two separate natural …
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