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  • 31. Application of statistical disclosure methods to the Canadian Hospitals Injury Reporting and Prevention Program Database Archived
    Articles and reports: 11-522-X200600110431
    Description:

    We describe statistical disclosure control methods (SDC) developed for a public release Canadian Hospitals Injury Reporting and Prevention Program (CHIRPP) micro-data file. CHIRPP is a national injury surveillance database managed by the Public Health Agency of Canada (PHAC). After describing CHIRPP, the paper includes a brief overview of basic SDC concepts, as an introduction to the process for selecting and developing the appropriate SDC methods for CHIRPP given its specific challenges and requirements. We then summarize some key results. The paper concludes with a discussion of the implication of this work for the health information field and closing remarks with respect to the some methodological issues for consideration.

    Release date: 2008-03-17
  • 32. Creation of public use micro-data files for the National Survey on Drug Use and Health (NSDUH) Archived
    Articles and reports: 11-522-X200600110433
    Description:

    The process of public-use micro-data files creation involves a number of components. One of its key elements is RTI International's innovative MASSC methodology. However, there are other major components in this process such as treatment of non-core identifying variables and extreme outcomes for extra protection. The statistical disclosure limitation is designed to counter both inside and outside intrusion. The components of the process are accordingly designed.

    Release date: 2008-03-17
  • 33. Disclosure risk and variance estimation Archived
    Articles and reports: 11-522-X200600110434
    Description:

    Protecting respondents from disclosure of their identity in publicly released survey data is of practical concern to many government agencies. Methods for doing so include suppression of cluster and stratum identifiers and altering or swapping record values between respondents. Unfortunately, stratum and cluster identifiers are usually needed for variance estimation using linearization and for replication methods as resampling is typically done on first-stage sampling units within strata. One might feel that releasing a set of replicate weights that also have stratum and cluster identifiers suppressed might circumvent this problem to some extent, especially using some random resampling such as the bootstrap. In this article, we first demonstrate that by viewing the replicate weights as observations in a high dimensional space one can easily use clustering algorithms to reconstruct the cluster identifiers irrespective of the resampling method even if the resampling weights are randomly altered. We then propose a fast algorithm for swapping cluster and strata identifiers of ultimate units before creating replicate weights without significantly impacting resulting variance estimates of characteristics of interest. The methods are illustrated by application to publicly released data from the National Health and Nutrition Examination Surveys, where such disclosure issues are extremely important..

    Release date: 2008-03-17
  • 34. Providing spatial data for secondary analysis: issues and current practices relating to confidentiality Archived
    Articles and reports: 11-522-X20050019433
    Description:

    Spatially explicit data pose a series of opportunities and challenges for all the actors involved in providing data for long-term preservation and secondary analysis - the data producer, the data archive, and the data user.

    Release date: 2007-03-02
  • 35. Quality-preserving controlled tabular adjustment: a method for resolving confidentiality and data quality issues for tabular data Archived
    Articles and reports: 11-522-X20050019434
    Description:

    Traditional methods for statistical disclosure limitation in tabular data are cell suppression, data rounding and data perturbation. Because the suppression mechanism is not describable in probabilistic terms, suppressed tables are not amenable to statistical methods such as imputation. Data quality characteristics of suppressed tables are consequently poor.

    Release date: 2007-03-02
  • 36. Common metadata constructs for statistical data Archived
    Articles and reports: 11-522-X20050019436
    Description:

    Regardless of the specifics of any given metadata scheme, there are common metadata constructs used to describe statistical data. This paper will give an overview of the different approaches taken to achieve the common goal of providing consistent information.

    Release date: 2007-03-02
  • 37. Documenting data elements in statistical agencies Archived
    Articles and reports: 11-522-X20050019437
    Description:

    The explanatory information accompanying statistical data is called metadata, and its presence is essential for the correct understanding and interpretation of the data. This paper will report on the experience of Statistics Canada in the conceptualization, naming and organization of variables on which data are produced.

    Release date: 2007-03-02
  • 38. Discovering microdata variables: Comparing DDI compliant documentation to an ISO/IEC 11179 metadata registry Archived
    Articles and reports: 11-522-X20050019438
    Description:

    A variety of standards for documenting the contents of data files have evolved over time, each with their own constituency and users. The Data Documentation Initiative (DDI) is an effort to establish an international XML-based standard for the content, presentation, transport, and preservation of documentation for datasets in the social and behavioural sciences.

    Release date: 2007-03-02
  • 39. Data documentation initiative (DDI) in the real world Archived
    Articles and reports: 11-522-X20050019455
    Description:

    The Data Documentation Initiative (DDI) is an internationally developed standard used to develop metadata. The Data Liberation Initiative (DLI) along with partner universities, including the University of Guelph are working towards the goal of creating metadata for all Statistics Canada surveys available to the DLI community.

    Release date: 2007-03-02
  • 40. Delivering the metadata: An RDC experience Archived
    Articles and reports: 11-522-X20050019456
    Description:

    The metadata associated with microdata production of major Statistics Canada household and social surveys are often voluminous and daunting. There does not appear to be a systematic approach to disseminating the metadata of confidential microdata files across all surveys. This heterogeneity applies to content as well as method of dissemination. A pilot project was conducted within the RDC Program to evaluate one standard, the Data Documentation Initiative (DDI), that might support such a process.

    Release date: 2007-03-02
Data (1)

Data (1) ((1 result))

  • 1. Historical Statistics of Canada Archived
    Table: 11-516-X
    Description:

    The second edition of Historical statistics of Canada was jointly produced by the Social Science Federation of Canada and Statistics Canada in 1983. This volume contains about 1,088 statistical tables on the social, economic and institutional conditions of Canada from the start of Confederation in 1867 to the mid-1970s. The tables are arranged in sections with an introduction explaining the content of each section, the principal sources of data for each table, and general explanatory notes regarding the statistics. In most cases, there is sufficient description of the individual series to enable the reader to use them without consulting the numerous basic sources referenced in the publication.

    The electronic version of this historical publication is accessible on the Internet site of Statistics Canada as a free downloadable document: text as HTML pages and all tables as individual spreadsheets in a comma delimited format (CSV) (which allows online viewing or downloading).

    Release date: 1999-07-29
Analysis (68)

Analysis (68) (0 to 10 of 68 results)

  • 1. Statistical disclosure control and special focus groups: A European perspective Archived
    Articles and reports: 11-522-X202200100007
    Description: With the availability of larger and more diverse data sources, Statistical Institutes in Europe are inclined to publish statistics on smaller groups than they used to do. Moreover, high impact global events like the Covid crisis and the situation in Ukraine may also ask for statistics on specific subgroups of the population. Publishing on small, targeted groups not only raises questions on statistical quality of the figures, it also raises issues concerning statistical disclosure risk. The principle of statistical disclosure control does not depend on the size of the groups the statistics are based on. However, the risk of disclosure does depend on the group size: the smaller a group, the higher the risk. Traditional ways to deal with statistical disclosure control and small group sizes include suppressing information and coarsening categories. These methods essentially increase the (mean) group sizes. More recent approaches include perturbative methods that have the intention to keep the group sizes small in order to preserve as much information as possible while reducing the disclosure risk sufficiently. In this paper we will mention some European examples of special focus group statistics and discuss the implications on statistical disclosure control. Additionally, we will discuss some issues that the use of perturbative methods brings along: its impact on disclosure risk and utility as well as the challenges in proper communication thereof.
    Release date: 2024-03-25
  • 2. Longitudinal Immigration Database (IMDB) Technical Report, 2022
    Articles and reports: 11-633-X2024001
    Description: The Longitudinal Immigration Database (IMDB) is a comprehensive source of data that plays a key role in the understanding of the economic behaviour of immigrants. It is the only annual Canadian dataset that allows users to study the characteristics of immigrants to Canada at the time of admission and their economic outcomes and regional (inter-provincial) mobility over a time span of more than 35 years.
    Release date: 2024-01-22
  • 3. The continued impacts of the COVID-19 pandemic: Variations in the economic integration of new immigrants
    Stats in brief: 11-001-X202402237898
    Description: Release published in The Daily – Statistics Canada’s official release bulletin
    Release date: 2024-01-22
  • 4. Comments by J.N.K. Rao on “Statistical disclosure control and developments in formal privacy: In memoriam to Chris Skinner”
    Articles and reports: 12-001-X202300100006
    Description: My comments consist of three components: (1) A brief account of my professional association with Chris Skinner. (2) Observations on Skinner’s contributions to statistical disclosure control, (3) Some comments on making inferences from masked survey data.
    Release date: 2023-06-30
  • 5. Statistical disclosure control and developments in formal privacy: In memoriam to Chris Skinner
    Articles and reports: 12-001-X202300100007
    Description: I provide an overview of the evolution of Statistical Disclosure Control (SDC) research over the last decades and how it has evolved to handle the data revolution with more formal definitions of privacy. I emphasize the many contributions by Chris Skinner in the research areas of SDC. I review his seminal research, starting in the 1990’s with his work on the release of UK Census sample microdata. This led to a wide-range of research on measuring the risk of re-identification in survey microdata through probabilistic models. I also focus on other aspects of Chris’ research in SDC. Chris was the recipient of the 2019 Waksberg Award and sadly never got a chance to present his Waksberg Lecture at the Statistics Canada International Methodology Symposium. This paper follows the outline that Chris had prepared in preparation for that lecture.
    Release date: 2023-06-30
  • 6. Tribute to Chris Skinner, a colleague and friend
    Articles and reports: 12-001-X202300100008
    Description: This brief tribute reviews Chris Skinner’s main scientific contributions.
    Release date: 2023-06-30
  • 7. Longitudinal Immigration Database (IMDB) Technical Report, 2021
    Articles and reports: 11-633-X2022009
    Description:

    The Longitudinal Immigration Database (IMDB) is a comprehensive source of data that plays a key role in the understanding of the economic behaviour of immigrants. It is the only annual Canadian dataset that allows users to study the characteristics of immigrants to Canada at the time of admission and their economic outcomes and regional (inter-provincial) mobility over a time span of more than 35 years.

    This report will discuss the IMDB data sources, concepts and variables, record linkage, data processing, dissemination, data evaluation and quality indicators, comparability with other immigration datasets, and the analyses possible with the IMDB.

    Release date: 2022-12-05
  • 8. Investigating the Use of Blockchain to Authenticate Data from the Statistics Canada Website
    Articles and reports: 11-633-X2022007
    Description:

    This paper investigates how Statistics Canada can increase trust by giving users the ability to authenticate data from its website through digital signatures and blockchain technology.

    Release date: 2022-09-19
  • 9. Confidentiality Vetting Support: Dominance and homogeneity using SAS Archived
    Stats in brief: 89-20-00082021001
    Description: This video is part of the confidentiality vetting support series and presents examples of how to use SAS to perform the dominance and homogeneity test while using the Census.
    Release date: 2022-04-29
  • 10. Confidentiality Vetting Support: Proportion and round tool using SAS Archived
    Stats in brief: 89-20-00082021002
    Description: This video is part of the confidentiality vetting support series and presents examples of how to use SAS to create proportion output for researchers working with confidential data.
    Release date: 2022-04-27
Reference (9)

Reference (9) ((9 results))

  • 1. Agriculture–Population Linkage: Data quality report
    Surveys and statistical programs – Documentation: 32-26-0006
    Description: This report provides data quality information pertaining to the Agriculture–Population Linkage, such as sources of error, matching process, response rates, imputation rates, sampling, weighting, disclosure control methods and data quality indicators.
    Release date: 2023-08-25
  • 2. Standard Geographical Classification (SGC) Volume II. Reference Maps
    Geographic files and documentation: 12-572-X
    Description:

    The Standard Geographical Classification (SGC) provides a systematic classification structure that categorizes all of the geographic area of Canada. The SGC is the official classification used in the Census of Population and other Statistics Canada surveys.

    The classification is organized in two volumes: Volume I, The Classification and Volume II, Reference Maps.

    Volume II contains reference maps showing boundaries, names, codes and locations of the geographic areas in the classification. The reference maps show census subdivisions, census divisions, census metropolitan areas, census agglomerations, census metropolitan influenced zones and economic regions. Definitions for these terms are found in Volume I, The Classification. Volume I describes the classification and related standard geographic areas and place names.

    The maps in Volume II can be downloaded in PDF format from our website.

    Release date: 2022-02-09
  • 3. The 2011 National Household Survey public use microdata file methodology: How to balance the requirement for more information and the requirement for low risk of disclosure in the microdata Archived
    Surveys and statistical programs – Documentation: 11-522-X201300014285
    Description:

    The 2011 National Household Survey (NHS) is a voluntary survey that replaced the traditional mandatory long-form questionnaire of the Canadian census of population. The NHS sampled about 30% of Canadian households and achieved a design-weighted response rate of 77%. In comparison, the last census long form was sent to 20% of households and achieved a response rate of 94%. Based on the long-form data, Statistics Canada traditionally produces two public use microdata files (PUMFs): the individual PUMF and the hierarchical PUMF. Both give information on individuals, but the hierarchical PUMF provides extra information on the household and family relationships between the individuals. To produce two PUMFs, based on the NHS data, that cover the whole country evenly and that do not overlap, we applied a special sub-sampling strategy. Difficulties in the confidentiality analyses have increased because of the numerous new variables, the more detailed geographic information and the voluntary nature of the NHS. This paper describes the 2011 PUMF methodology and how it balances the requirements for more information and for low risk of disclosure.

    Release date: 2014-10-31
  • 4. 2006 Census Dissemination Consultation Report Archived
    Notices and consultations: 92-132-X
    Description:

    This report describes the comments received as a result of the second round of the 2006 Census consultations. As with the previous 2006 Census consultation, this second round of consultations integrated discussions on the dissemination program, questionnaire content and census geography. However, the focus of this second round of consultations was placed on the 2001 Census of Population dissemination program and proposed directions for 2006 geography. Consultations were held from January to June 2004. Approximately 1,000 comments were captured through written submissions and the organization of over 40 meetings across Canada.

    This report describes users' feedback on dissemination and geography issues received through this second round of consultations. In addition to user's comments, web metrics information serves as a valuable tool when evaluating the accessibility of public good data tables. Therefore, page view counts have been integrated in this report.

    Some general planning assumptions that focus on the production and dissemination of 2006 Census products are also included in this report.

    Release date: 2005-05-31
  • 5. Consultation Guide - 2001 Census of Population Dissemination and Proposed Directions for 2006 Geography Archived
    Notices and consultations: 92-131-G
    Description:

    This guide has been developed to help users convey their ideas and suggestions to Statistics Canada regarding the 2001 Census products and services line. It contains a series of questions about specific dissemination issues and topics related to the 2001 Census dissemination strategy. The document covers many aspects of census dissemination. Readers are welcome to focus on sections of particular interest to them. In addition, users are welcome to provide comments on any other census-related issues during this consultation process.

    Release date: 2004-04-08
  • 6. User's Guide for Cross-sectional Public-use Microdata File: Survey of Labour and Income Dynamics, Reference Year 2000 Archived
    Surveys and statistical programs – Documentation: 75F0002M2003002
    Description:

    This series provides detailed documentation on income developments, including survey design issues, data quality evaluation and exploratory research for the Survey of Labour and Income Dynamics in 2000.

    Release date: 2003-06-11
  • 7. SLID Microdata Files: Content Proposal Part A: Overview Archived
    Surveys and statistical programs – Documentation: 75F0002M199303A
    Description:

    This paper is intended as an initial proposal for a strategy for the Survey of Labour and Income Dynamics (SLID) longitudinal microdata files.

    Release date: 1995-12-30
  • 8. SLID Microdata Files: Content Proposal Part B: Detailed Specifications Archived
    Surveys and statistical programs – Documentation: 75F0002M199303B
    Description:

    This paper presents detailed information on specific data variables for the Survey of Labour and Income Dynamics (SLID) microdata files.

    Release date: 1995-12-30
  • 9. First Microdata File of the Survey of Labour and Income Dynamics: Expected Content Archived
    Surveys and statistical programs – Documentation: 75F0002M1995018
    Description:

    This paper presents a preview of the variables on the first microdata file of the Survey of Labour and Income Dynamics.

    Release date: 1995-12-30
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