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Working with Canadian Census Microdata

Working with Canadian Census Microdata. Martine Grenier and Mokili Mbuluyo Census Operations Division, Statistics Canada December 2007. Overview. Introduction General content of a Census microdata file Census metadata Production plan. Introduction.

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Working with Canadian Census Microdata

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  1. Working with Canadian Census Microdata Martine Grenier and Mokili Mbuluyo Census Operations Division, Statistics Canada December 2007

  2. Overview • Introduction • General content of a Census microdata file • Census metadata • Production plan

  3. Introduction • Census information has been made available in standard products (profiles, highlights…), custom tabulations and public use microdata files • Following 2001 consultations, the need to have access to census microdata files was required to do more in-depth analysis (ie. modeling, regressions..) • The census data is the most fundamental source of information regarding Canadian society.

  4. 1. Content of the Census microdata file A unique file:with links between the 4 universes Individuals Family Households Dwellings Microdata file

  5. 1. Content of the Census microdata file (cont…) • Sample size: • 100 % of the 2B questionnaire (long form). • Represents 1/5 of the Canadian population. • Population includes: • Canadian citizens • Permanent residents • Non-permanent residents (refugees, students, work permits) • Population excluded: • Institutional residents (collective dwellings: hospitals, correctional centres) • Foreign residents (foreign visitors, diplomatic bodies) • Some Indian Reserves and Northen Communities • Content of Microdata file varies over census years

  6. 1. Content of the Census microdata file (Cont…) • Geography • Census Tract level for urban areas. A C.T. usually has a population of 2,500 to 8,000. • CSD level for rural areas • Variables • 2B variables (from the questionnaire, long form) • Public derives (certified, complex and popular) Examples: Loinc (low income), Age, SecGrad (Schooling)

  7. 2. Census Metadata Reference tools provide information on every aspect of the census population. The 2001 Census metadata includes: • Codebooks • 2001 Census Dictionary • Census Handbook • 2001 Sampling and Weighting Census Technical Report • 2001 Census Quality Confidentiality • Geography Suppression Files (Excel)

  8. 2. Census Metadata (cont…) 1) Codebook • Unweighted - Confidential • Weighted - Public (Excel spreadsheet) • Variable List - Public (2001 Census)

  9. 2. Census Metadata (cont…) 2) Census Dictionnary • Provides definitions for all the concepts, variables and geographic terms of the 2001 Census. • Describes all census universes (individuals, families, households, dwellings) • Emphasizes major variable changes • List of new variables and terms

  10. 2. Census Metadata (cont…) 3) Census Handbook • Offers a complete overview of every phase of the census, from content determination to data dissemination with a focus on the changes that have occurred since last census.

  11. 2. Census Metadata • Provide data quality indicators attached to each standard geographic area. 4) Geography Suppression Files (Excel)

  12. 3. Production plan • Census 2001, June 2007 (done) • Census 1996, November 2007 (done) • Census 2006, end of summer 2008 • Census 1991, to be determined

  13. Thank you!

  14. Questions?----------------------------------------------------------Information :Census Client ServicesMicrodata and Analytical unite-mail:cen-microd-rec@statcan.ca

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