Only Detroit has a higher net migration rate among the 200 largest U.S. metros.
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If the migration rate outside of the 10-mile zone were greater than 20 percent, it fears that those living inside that radius could get trapped.
As Calderon recently noted in The Wall Street Journal, the net rate of migration of Mexican workers toward the United States has recently been zero.
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And economists would look at retention rate, internal talent migration, and cross training opportunities within the company.
North Dakota now boasts the highest rate of domestic in-migration in the country.
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The government plans to continue limiting the growth rate of the largest urban areas, but to allow more legal migration from the countryside.
This migration is one of the many underlying currents that carried the U.S. unemployment rate to 10% in October 2009.
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But in order to function properly, to function at an acceptable level of dysfunction, command systems need to exert an extraordinary degree of control over economic life: they need to control foreign travel, they need to restrict residency patterns and limit internal migration, they need to fix prices, they need to arbitrarily set a foreign exchange rate, and they need to place extreme restrictions on foreign trade.
The Institute for Employment Research, based in Nuremberg, reckons that migration into Germany will add an extra 1.5 percentage points to the country's growth rate by 2020, with little or no effect on the rate of unemployment.
Migration from other parts of America means that the state's population is growing at the second-fastest rate in America.
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