Census Bureau Fernando Casimiro, Coordinator

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IPUMS - Portugal
Country Report

• Census Bureau Fernando Casimiro, Coordinator

Lisboa - 2007.08.25
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Summary

• These slides are based upon the Country Report of
  Portugal which can be acceded on request (IPUMS
  Europe Country Report Portugal-Draft version -
  Prepared by Fernando Casimiro - National
  Statistical Institute -fernando.casimiro_at_ine.pt)
• Main subjects of the slides
• History
• Public data organisation
• Microdata files samples, content,
  harmonisation, completeness of enumeration
• Future

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Main historic features

• Population counts in the years 0000, 1260, 1421,
  1527,1636, 1732, 1776 and 1801
• New census data set, following main features of
  Brussels Congress held on 1853 1864, 1878, 1890,
  1900, 1911, 1920, 1930, 1940, 1950, 1960, 1970,
  1981, 1991 and 2001
• Last 3 censuses constitute the most consistent
  group in terms of concepts, tabulation data and
  microdata available.

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Public data organisation for 1981, 1991 and 2001

• 6 sets of tables
• Group 1 - General data
• Group 2 - Data on buildings
• Group 3 Data on housing units
• Group 4 Data on households
• Group 5 Data on families/family nuclei
• Group 6 Data on individuals
• Data publications contain only the most important
  tables at the upper levels of geographical
  breakdown. Lowest geo and administrative
  breakdowns are available by request, directly or
  through the internet as well as tailored data.
• Publications on methodology for the 3 censuses
  and Post Enumeration Survey (2001)

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1981, 1991 and 2001 microdata samples

• Systematic selection for every 20th private
  dwelling/housing unit (start on the first
  dwelling for each of the seven NUTS II)
• Systematic sample for every 20th person living in
  collective dwellings (start on the first person
  living in a collective dwelling of each of the
  seven NUTS II)
• Geographical breakdowns only for areas 200.000
  people

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1981, 1991 and 2001 microdata samples

• Why did we decide to extract independent samples?

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1981, 1991 and 2001 microdata files - content

• Geographic characteristics of persons place of
  usual residence, place where found at time of
  census (population resident and present at the
  same place), place of usual residence one year
  and five years prior to the census (1981 was one
  year and 8 years due to the return of people from
  de African ex-colonies) and urban/rural
• Demographic characteristics of persons sex, age,
  marital status (for 1981, the instructions were
  not enough clear but it prevails the legal one
  for 1991 and 2001 it prevails always the de
  facto situation), country/place of birth,
  country of citizenship, religion (free answer due
  to legal constrains)
• Economic characteristics of persons (current and
  on the basis of the complete week previous to the
  census day) current activity status, time
  usually worked, occupation, industry, status in
  employment, place of work, type of sector, number
  of persons working in the enterprise (only for
  1991 and 2001 not in the local unit due to the
  occupations classification which asks for the
  number of persons in the enterprise), main source
  of livelihood (last 12 months), dependency
  relationship, location of school, mode of
  transport to work/school
• Educational characteristics of persons
  Educational attainment, educational
  qualifications (medium, professional and 3th
  level in 1981 and 1991 only 3th level in 2001),
  school attendance, literacy
• Household and family characteristics of persons
  relationship to the reference person of private
  household, type of institutional household or
  other communal establishment in which a person
  lives and whether living as inmate of an
  institutional household or other communal
  establishment or not, household status, family
  status
• Characteristics of family nuclei type of family
  nucleus, size of family nucleus, number of
  children under a specific age, number of
  economically active members, specified age groups
  of children, number of members whose main source
  of livelihood is economic activity, number of
  dependent members
• Characteristics of private households type of
  private household, size of private household,
  number of economically active members, number of
  children under a specified age, number of members
  of retirement age, tenure status of households,
  generational composition of private households,
  number of members whose main source of livelihood
  is economic activity, number of dependent
  members, single or shared occupancy.
• Together with the previously described variables,
  also the disability is included but only for
  2001.

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1981, 1991 and 2001 microdata files - content

• Characteristics of housing units and other living
  quarters type of living quarter, type of
  ownership, location of living quarter, occupancy
  status, number of occupants, number of rooms,
  kitchen, water supply system, toilet facilities,
  bathing facilities, type of heating (only for
  2001), type of vacancy, occupancy by one or more
  households, type of sewage disposal system, main
  type of energy for heating (only for 2001),
  electricity period of construction, lift (only
  2001) and type of roof of the building to which
  the dwelling belongs.

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1981, 1991 and 2001 microdata files -
Harmonization

• Geography adapted to the existing in 2001
• Some small problems on
• Marital status prevalence of de facto status
  since 1991
• Private household mix of kinship relations and
  housekeeping concept
• Institutional household reorganised in 1991
• Education only the classification of
  professional training was changed since 1991
• Economic variables different lower age limits
  for being economically active and the strictu
  sensu unemployment only since 1991

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1981, 1991 and 2001 - Completeness of enumeration

• 1981 more or less unknown, but data well
  accepted by the users
• 1991 net coverage rates of 99,04 for
  individuals and 99,42 for housing units, but not
  well accepted by the users
• 2001 net coverage rates of 100,7 for
  individuals and 99,5 for housing units, and very
  well accepted by the users

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Back to the Future

• IPUMS was an interesting challenge on trying a
  new way on census data dissemination
• Users are more and more in this way making
  their own tabulations
• For 2011, hypercubes and anonymised samples of
  microdata are scheduled to come immediately from
  the normal production line

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• Many thanks for your attention!