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Migration Dialogue provides timely, factual and nonpartisan information and analysis of international migration issues through five major activities: the newsletters Migration News and Rural Migration News, Changing Face and other Research & Seminars, and the Sloan West Coast Program on Science and Engineering Workers.
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Would the world's GDP double or triple if border controls were lifted and migrants moved from lower-to-higher wage countries? Several studies have concluded the answer is yes, so that maintaining border controls is equivalent to leaving "trillion dollar bills on the sidewalk."
The economic reasoning behind projections of huge increases in global GDP with more migration rest on a simple proposition. Wages reflect the value of the marginal contributions of workers to what they help to produce. Since more capital and better infrastructure make workers more productive in richer countries, workers who move from poorer to richer countries earn higher wages.