Net migration rate

Net migration rate
Net migration rates for 2008. Legend:
  positive
  negative
  stable
  no data

Net migration rate is the difference of immigrants and emigrants of an area in a period of time, divided (usually) per 1,000 inhabitants (considered on midterm population). A positive value represents more people entering the country than leaving it, while a negative value mean more people leaving than entering it.

Example

On January 1, 2000 country A has a population of 1,000,000 inhabitants. From that date to January 1, 2001, 200,000 people immigrated to A, and 100,000 people left the country. At the same time, there were 100,000 babies born, and nobody died. Therefore, the population of A On January 1, 2001 is 1,200,000.

We consider that on July 1, 2000 (the middle of our time term) there were 1,100,000 inhabitants. And since 100,000 left and 200,000 came, the migration difference is +100,000.

100,000 \div 1,100,000 = 0.09091

But this value is per inhabitant, and we want a per 1,000 persons value:

0.09091 \times 1,000 = 90.91

This number gives us a comparable idea of the impact of migration on the country's population.

See also

External links


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