<P> The net migration rate is the difference between the number of immigrants (people coming into an area) and the number of emigrants (people leaving an area) throughout the year . When the number of immigrants is larger than the number of emigrants, a positive net migration rate occurs . A positive net migration rates indicates that there are more people entering than leaving an area . So when we have more emigrants than immigrants the result is a negative net migration rate, meaning that more people are leaving than entering the area . When there is an equal number of immigrants and emigrants, the net migration rate is balanced . </P> <P> The net migration rate is calculated over a one - year period using the mid year population and a ratio . </P> <P> Migration occurs over a series of different push and pull factors that revolve around social, political, economical, and environmental factors according to Migration Trends . Social migration is when an individual migrates to have a higher standard of living, to be closer to family or to live in a nation with which they identify more . Political migration then is when a person is going in as a refugee to escape war or political persecution . Economical migration is moving to a place where one can aspire to have a career and better job opportunities which end up contributing to better living conditions . Lastly, environmental migration is when natural disasters force you to move into a new area . Once we analyze all of the migrating factors we can get to the idea that the net migration rate can tell us so much about a country . For example, if there are a lot of people coming in and not many leaving we can assume it is a wealthy country that keeps evolving and generating more and more opportunities . On the other hand, if not many people are coming in and many are leaving it is easy to assume that there is a chance of violence, low economy, or not enough resources to fulfill the existing population . </P> <P> N = (I - E) / MX 1,000 </P>

What is the speed of the net gain of one international migration