1) The Component Method :
This method is used when data are available from a census (base year population) , administrative records of births and deaths and net migration. The estimate is obtained by adding both natural increase and net migration that have occurred since the last census according to following formula:
Pt = Po+B-D+I-E
Where:
Pt
The Current Estimate
Po
The Base Year resident Population (2005 census).
B
Births that have occurred since the last census.
D
Deaths that have occurred since the last census.
I
Number of Immigrants since the last census.
E
Number of emigrants since the last census.
t
Time elapsed since the last census.
2) Natural Increase:
Natural Increase in specific year = Births of the year-Deaths of the year
Data on births and deaths are obtained from the administrative records of the Ministry of Health.
3) Net Migration :
Net migration = Immigrants - Emigrants.
Data are obtained from the administrative records of the
Ministry of Interior.
4) Calculation of net migration:
The net migration was calculated as follows:
Net migration = (residence permits issued for the first time – residence permits that have been cancelled and not renewed) +
(arrivals of the Gulf Cooperation Council nationals - departures of the Gulf Cooperation Council nationals).
5) Requirements of the estimation:
1. Using this method requires the availability of annual data at the emirate’s level on external and internal migration by sex and nationality, which are obtained from the administrative records of the Ministry of the Interior, in order to calculate the net migration as a component of the previous equation where: (net migration = I-E).
2. Using this method requires also the availability of annual data on births and deaths at the emirate’s level by sex and nationality, which are obtained from the administrative records of the