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6.8. In-Migration (from Overseas)
The data requirements for the ‘overseas’ in-migration file (labelled as Mig_INOV in the model
setup process described in this manual) are described here.
For there to be any in-migration from overseas, counts must be specified on the group worksheets.
If no counts are specified, this migration flow will be assumed to be zero.
The overseas in-migration workbook has:

a ‘Sched’ worksheet, on which an age-sex distribution of migrants is entered. The
schedules in this workbook are expressed as percentages;

a ‘Notes’ worksheet;

a worksheet for each of the population groups you defined during the model setup and
an ‘all groups’ worksheet. The labels of the sheets for each group will correspond to the
short names defined at model setup.
6.8.1. Age-sex distribution of migrants
Unlike in the other migration files, the schedule on this file represents an age sex distribution of
migrants, rather than migration rates.
On the ‘Sched’ worksheet (Figure 26), the distribution of migrants by single year of age and sex is
entered. The minimum data requirement is the provision of values for the standard schedule by
single year of age for both males and females. Distribution values are required for ages 0 to 89, and
age 90+. Each value is expressed as a percentage. Values must sum to 100% (if they do not,
POPGROUP will scale them to sum to 100% before they are used in a forecast).
If, at model setup, the user specified a standard rates file (see section 4.2.1), the ‘Standard’ column
on the ‘Sched’ worksheet will be populated with the chosen standard distribution of migrants
schedule for males and females. The user may wish to define a different standard distribution or an
area- or group-specific distribution of migrants. If supplied a group schedule will override the
standard schedule.
On this migration file the schedule is used only as a distribution mechanism – i.e. to disaggregate
counts of migrants to single year of age and sex.
POPGROUP v.4