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is the population at the end of the period
is the population at the start of the period
n is the length of the period between and in years.
Category jumping was the term used to describe changes between intended and actual duration of stay of travellers to/from Australia, such that their classification as short-term or as long-term/permanent movers is different at arrival/departure from that after 12 months. For more information see Migration, Australia, 2002-03 (cat. no. 3412.0), Chapter 6, 'Special article: Adjustments to overseas migration estimates'.
The Australian resident component of category jumping for a reference quarter was estimated by comparing the number of residents departing short-term in that quarter with all residents who left in that quarter and return in the following 12 months, to obtain the net number of Australian residents who 'jumped category'.
Similarly, the number of overseas visitors arriving short-term in a quarter was compared with all overseas visitors who arrived in that quarter and depart in the following 12 months, to obtain the net number of overseas visitors 'who jumped category'.
Estimates of category jumping were derived by subtracting the Australian resident component from the overseas visitor component.
Category jumping is no longer used following the implementation of the '12/16 month rule' methodology for estimating net overseas migration.
Category of movement
Category of movement is of particular relevance to the overseas arrivals and departures (OAD) collection. OAD are classified according to length of stay (in Australia or overseas), as recorded by travellers on passenger cards or derived with reference to previous border crossings. There are three main categories of movement and 10 sub-categories:
A significant number of travellers (i.e. overseas visitors to Australia on arrival and Australian residents going abroad) state exactly 12 months or one year as their intended period of stay. Many stay for less than that period and on their departure from, or return to, Australia are therefore classified as short-term. Accordingly, in an attempt to maintain consistency between arrivals and departures, movements of travellers who report their actual or intended period of stay as being one year exactly are randomly allocated to long-term or short-term in proportion to the number of movements of travellers who report their actual length of stay as up to one month more, or one month less, than one year.
The complete enumeration of a population or groups at a point in time with respect to well-defined characteristics (e.g. Population, Manufacturing, etc.). When the word is capitalised, "Census" usually refers to the national Census of Population and Housing.
The Census of Population and Housing enumerates persons on the basis of where they were located on Census Night. The Census also compiles information on people according to their place of usual residence. This information is coded to Census collection districts (CDs). This means that Census counts of people can be produced according to their location on Census Night as well as their place of usual residence. Characteristics of households are based on persons usually resident in a dwelling.
Country of birth
The classification of countries is the Standard Australian Classification of Countries (SACC). For more detailed information refer to Standard Australian Classification of Countries (SACC) Second Edition (cat. no. 1269.0).
Country of residence
Country of residence refers to the country in which travellers regard themselves as living or as last having lived.
All persons aged under 15 years; and persons aged 15-24 years who are full-time students, have a parent in the household and do not have a partner or child of their own in the household.
Gross income less income tax, the Medicare levy and the Medicare levy surcharge i.e. remaining income after taxes are deducted, which is available to support consumption and/or saving. Income tax, Medicare levy and the Medicare levy surcharge are imputed based on each person's income and other characteristics as reported in the survey. Disposable income is sometimes referred to as net income.
The process of leaving one country to take up permanent or semi-permanent residence in another.
Equivalised disposable household income
Disposable household income adjusted using an equivalence scale. For a lone person household it is equal to disposable household income. For a household comprising more than one person, it is an indicator of the disposable household income that would need to be received by a lone person household to enjoy the same level of economic well-being as the household in question. For further information see Appendix 3 in Household Income and Income Distribution, Australia, 2007-08 (cat. no. 6523.0).
Estimated resident population (ERP)
The estimated resident population (ERP) is the official measure of the population of Australia. It is based on the concept of usual residence. For the purpose of ERP, a person is regarded as a usual resident if they have been (or are expected to be) residing in Australia for a period of 12 months or more. As such, it refers to all people, regardless of nationality, citizenship or legal status who usually live in Australia, with the exception of foreign diplomatic personnel and their families.
Family composition of household
Classifies households into three broad groupings based on the number of families present (one family, multiple family and non-family). One family households are further disaggregated according to the type of family (such as couple family or one parent family) and according to whether or not dependent children are present. Non-family households are disaggregated into lone person households and group households.
Those categories of the Migration Program where the core eligibility criteria are based on a close family relationship with an Australian citizen or permanent resident sponsor. The immediate accompanying families of principal applicants in the family stream (e.g. children of spouses) are also counted as part of the family stream.
This definition of family stream is used by the Department of Immigration and Citizenship (DIAC) who administer the Migration Program.
A person living alone or a group of related or unrelated people who usually live in the same private dwelling.
Housing mobility refers to the movement of people due to a change in their place of usual residence.
The Humanitarian Program provides protection to refugees and resettlement to those for whom it may be the appropriate durable solution. The Humanitarian Program is administered by DIAC.
Initial category of travel
Predominantly used to assist in the estimation of preliminary net overseas migration (NOM). Like category of movement, all overseas arrivals and departures are classified according to length of stay (in Australia or overseas), as recorded by travellers on passenger cards or derived with reference to previous border crossings. However, unlike the category of movement, all travellers are assigned to one, and only one, initial category of travel during the reference quarter. This removes the potential for a traveller to be included more than once in different categories of travel if they have made multiple overseas movements during the reference quarter.
For the purposes of estimating NOM, the rule used to assign an initial category of travel to each traveller is as follows:
For the purposes of calculating NOM, there are three main initial categories of travel and 10 sub-categories:
Intended length of stay
On arrival in Australia, all overseas visitors are asked to state their 'Intended length of stay in Australia'. On departure from Australia, all Australian residents are asked to state their 'Intended length of stay overseas'.
Intercensal discrepancy is the difference between two estimates at 30 June of a Census year population, the first based on the latest Census and the second arrived at by updating the 30 June estimate of the previous Census year with intercensal components of population change which take account of information available from the latest Census. It is caused by errors in the start and/or finish population estimates and/or in estimates of births, deaths or migration in the intervening period which cannot be attributed to a particular source.
Intercensal error is the difference between two estimates at 30 June of a Census year population, the first based on the latest Census and the second arrived at by updating the 30 June estimate of the previous Census year with intercensal components of population change which do not take account of information available from the latest Census.
The process of entering one country from another to take up permanent or semi-permanent residence.
The difference between the number of persons who have changed their place of usual residence by moving into a defined geographical area within Australia and the number who have changed their place of usual residence by moving out of that defined geographical area during a specified time period. This difference may be either positive or negative.
See net interstate migration.
Long-term arrivals comprise:
Long-term departures comprise:
Main reason for journey
Overseas visitors/temporary entrants arriving in Australia and Australian residents departing temporarily from Australia are asked to state their main reason for journey. All statistics relating to main reason for journey use the following categories:
Main state or territory of stay
Overseas visitors are asked on departure for the name of the state or territory in which they spent the most time.
For any distribution the median age is that age which divides the relevant population into two equal parts, half falling below the value, and half exceeding it. Where the age for a particular record has not been stated, that record is excluded from the calculation.
The movement of people across a specified boundary for the purpose of establishing a new or semi-permanent residence. Migration can be international (migration between countries) and internal (migration within a country).
The ABS applies a number of adjustments to overseas arrivals and departures data in order to produce estimates of net overseas migration (NOM). These mainly comprise adjustments designed to reflect differences between stated travel intentions and actual travel behaviour, but also include adjustments to transform numbers of overseas movements into numbers of travellers. Migration adjustments replaced the 'category jumping' adjustments previously applied to NOM estimates.
Migration effectiveness ratio (MER)
The net gain or loss of persons from or to a population divided by the total gross moves (i.e. arrivals plus departures) and expressed as a percentage. The lower the ratio, the less the effectiveness of migration as a process of population redistribution.
The annual planned (non-Humanitarian) permanent intake administrated by DIAC which regulates the number of visas granted for permanent entry from offshore and for permanent resident status onshore. It does not include New Zealand citizens, Australian citizens returning after permanently departing, residents of external territories such as Norfolk Island, and persons granted Australian citizenship overseas.
Excess of births over deaths.
Net interstate migration (NIM)
The difference between the number of persons who have changed their place of usual residence by moving into a given state or territory and the number who have changed their place of usual residence by moving out of that state or territory. This difference can be either positive or negative.
Net overseas migration (NOM)
Net overseas migration is the net gain or loss of population through immigration to Australia and emigration from Australia. It is:
Under the current method for estimating final net overseas migration this term is based on a traveller's actual duration of stay or absence using the '12/16 month rule'. Preliminary NOM estimates are modelled on patterns of traveller behaviours observed in final NOM estimates for the same period one year earlier.
Net overseas migration rate
The net overseas migration rate is the number of NOM travellers in a given period divided by the population sending or receiving the NOM travellers at a given period. It is calculated per 1,000 population.
NOM arrivals are all overseas arrivals that contribute to net overseas migration (NOM). It is the number of incoming international travellers who stay in Australia for 12 months or more, who are not currently counted within the population, and are then added to the population.
Under the current method for estimating final net overseas migration this term is based on a traveller's
actual duration of stay or absence using the '12/16 month rule'.
NOM departures are all overseas departures that contribute to net overseas migration (NOM). It is the number of outgoing international travellers (Australian residents and long term visitors to Australia) who leave Australia for 12 months or more, who are currently counted within the population, and are then subtracted from the population.
Under the current method for estimating final net overseas migration this term is based on a traveller's
actual duration of stay or absence using the '12/16 month rule'.
Following amendments to the Acts Interpretation Act 1901 effective from July 1992, the two external territories of Christmas Island and Cocos (Keeling) Islands became part of geographical Australia. Since the 1996 Census, Christmas Island, Cocos (Keeling) Islands, and the Jervis Bay Territory (previously linked to the Australian Capital Territory for statistical purposes) comprise a pseudo 'ninth state/territory' of Australia. They are included in state nine 'Other Territories'.
Overseas arrivals and departures (OAD)
Overseas arrivals and departures (OAD) refer to the recorded arrival or departure of persons through Australian air or sea ports (excluding operational air and ships' crew). Statistics on OAD relate to the number of movements of travellers rather than the number of travellers (i.e. the multiple movements of individual persons during a given reference period are all counted).
See net overseas migration (NOM).
Overseas migration adjustment
See Migration adjustment.
Owner (of dwelling)
A household in which at least one member owns the dwelling in which the household members usually reside. Owners are divided into two classifications - owners without a mortgage and owners with a mortgage. If there is any outstanding mortgage or loan secured against the dwelling the household is an owner with a mortgage. If there is no mortgage or loan secured against the dwelling the household is an owner without a mortgage.
Passenger cards are completed by nearly all passengers arriving in, or departing from, Australia. Information including occupation, nationality, intended length of stay, main reason for journey, and state or territory of intended stay/residence is collected.
Units of difference between two percentages.
Permanent arrivals (settlers) comprise:
This definition of settlers is used by DIAC. Prior to 1985 the definition of settlers used by the ABS was the stated intention of the traveller only. Numerically the effect of the change in definition is insignificant. The change was made to avoid the confusion caused by minor differences between data on settlers published separately by the ABS and DIAC.
Permanent departures are Australian residents (including former settlers) who on departure state that they are departing permanently.
Permission to travel to, enter and/or remain in Australia for a period of time or indefinitely.
Place of usual residence
See usual residence.
Population age-sex pyramid
A population age-sex pyramid is a bar chart graphically representing the age structure of the population, usually in five-year age groups, for males and females separately. The age structure of the population usually approximates the shape of a pyramid because mortality progressively reduces the number in each birth cohort as it ages. The age pyramid is useful to show the existence of unusually large or small cohorts, and in this way, not only conveys a lot about a country's past demographic history, but also a great deal about its demographic future.
For Australia, population growth is the sum of natural increase and net overseas migration. For states and territories, population growth also includes net interstate migration. After the Census, intercensal population growth also includes an allowance for intercensal discrepancy.
Population growth rate
Population change over a period as a proportion (percentage) of the population at the beginning of the period.
Population turnover is the sum of interstate arrivals and departures during a year expressed as a proportion of the resident population of the state or territory at the beginning of a time period. Population turnover can also incorporate overseas arrivals and departures (as used for net overseas migration estimates) to and from each state or territory during a year.
Groupings that result from ranking all households or people in the population in ascending order according to some characteristic, such as their household income, and then dividing the population into five equal groups, each comprising 20% of the estimated population.
Return migration is the emigration of former settlers to their country of birth.
Self reported temporary NOM arrival
A self reported temporary NOM arrival is any traveller who has identified themselves as a visitor or temporary entrant on Australia's incoming passenger card; who are not currently counted within the population; and then contributed to net overseas migration and the population by staying in Australia for 12 months or more over a 16 month reference period.
The sex ratio relates to the number of males per 100 females. The sex ratio is defined for total population, at birth, at death and among age groups by selecting the appropriate numerator and denominator of the ratio.
Short-term arrivals comprise:
Short-term departures comprise:
Those categories of the Migration Program where the core eligibility criteria are based on the applicant's employability or capacity to invest and/or do business in Australia. The immediate accompanying families of principal applicants in the skill stream are also counted as part of the skill stream.
This definition of skill stream is used by DIAC who administer the Migration Program.
State or territory of intended address/where lived
Overseas visitors are asked on arrival in Australia for their state or territory of intended address. On departure from Australia, overseas visitors are asked the state or territory where they spent most time.
Australian residents are asked on departure for the state or territory in which they live/lived. Residents returning to Australia are asked for their state or territory of intended address.
State or territory of intended stay
See State or territory of intended address/where lived.
State or territory of usual residence
State or territory of usual residence refers to the state or territory and SLA of usual residence of the estimated resident population.
In the case of overseas movements, state or territory of usual residence refers to the state or territory regarded by the traveller as the one in which he/she lives or has lived. State or territory of intended residence is derived from the intended address given by settlers, and by Australian residents returning after a journey abroad. Particularly in the case of the former, this information does not necessarily relate to the state or territory in which the traveller will eventually establish a permanent residence.
State or territory where spent most time
See Main state or territory of stay.
Step migration is the emigration of former settlers to a country other than their country of birth.
See temporary visas
Temporary entrant visas are visas permitting persons to come to Australia on a temporary basis for specific purposes which result in some benefit to Australia. Main contributors are international students, Temporary Resident visas (including temporary business entrants and working holiday makers) and visitors.
Temporary NOM arrivals
Temporary NOM arrivals are all temporary overseas arrivals that contribute to net overseas migration (NOM). It is the number of incoming international travellers who stay in Australia for 12 months or more and are added to the population but are not migrating permanently.
Under the current method for estimating final net overseas migration, this term is based on a traveller's
actual duration of stay or absence using the 12/16 rule.
Temporary resident visas
Temporary resident visas are visas issued to allow persons who intend to work or temporarily reside in Australia and can include working holiday makers, long term business entrants. These types of temporary resident visas are granted on the basis of there being an economic, social, cultural or sporting benefit to Australia. Initial stay in Australia is generally for more than three months but not more than four years.
The nature of a unit's (i.e. household's, income unit's or person's, where applicable) legal right to occupy the dwelling in which they usually reside. Tenure is determined according to whether the unit owns the dwelling outright, owns the dwelling but has a mortgage or loan secured against it, is paying rent to live in the dwelling or has some other arrangement to occupy the dwelling.
Usual residence within Australia refers to that address at which the person has lived or intends to live for a total of six months or more in a given reference year.
Permission or authority granted by the Australian government to foreign nationals to travel to, enter and/or remain in Australia for a period of time or indefinitely. Visas are managed by DIAC.
Visitor visas are visas issued to persons who intent to stay in a Australia for a short period of time. Visitor visas include tourism, short stay business, visiting relatives and medical treatment.
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