<P> In demographics , the rate of natural increase ( RNI ) is the crude birth rate minus the crude death rate . This rate excludes population increase from in migration and out migration . When looking at countries , it gives an idea of what position in the Demographic Transition Model , but to find out how much a country is growing , the population growth rate should be observed . The Demographic Transition Theory explains the rate of natural increase relate to the economic growth . </P>
<P> In demographics , the rate of natural increase ( RNI ) is the crude birth rate minus the crude death rate . This rate excludes population increase from in migration and out migration . When looking at countries , it gives an idea of what position in the Demographic Transition Model , but to find out how much a country is growing , the population growth rate should be observed . The Demographic Transition Theory explains the rate of natural increase relate to the economic growth . </P>
when calculating the rate of natural increase one does not include
when calculating the rate of natural increase one does not include
population increase from in migration and out migration
population increase from in migration and out migration