Disclosure control and data dissemination
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- Articles and reports: 11-522-X202200100007Description: 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
- Stats in brief: 11-001-X202402237898Description: Release published in The Daily – Statistics Canada’s official release bulletinRelease date: 2024-01-22
- Articles and reports: 11-633-X2024001Description: 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
- Surveys and statistical programs – Documentation: 32-26-0006Description: 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
- Articles and reports: 12-001-X202300100006Description: 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
- Articles and reports: 12-001-X202300100007Description: 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
- Articles and reports: 12-001-X202300100008Description: This brief tribute reviews Chris Skinner’s main scientific contributions.Release date: 2023-06-30
- Articles and reports: 11-633-X2022009Description:
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 - Articles and reports: 11-633-X2022007Description:
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 - Stats in brief: 89-20-00082021001Description: 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
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Data (1)
Data (1) ((1 result))
- 1. Historical Statistics of Canada ArchivedTable: 11-516-XDescription:
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) (10 to 20 of 68 results)
- Stats in brief: 89-20-00082021003Description: This video is part of the confidentiality vetting support series and presents examples of how to use Stata to create proportion output for researchers working with confidential data.Release date: 2022-04-27
- Stats in brief: 89-20-00082021004Description: This video is part of the confidentiality vetting support series and presents examples of how to use Stata to perform the dominance and homogeneity test while using the Census.Release date: 2022-04-27
- Stats in brief: 89-20-00082021005Description: This video is part of the confidentiality vetting support series and presents examples of how to use R to create proportion output for researchers working with confidential data.Release date: 2022-04-27
- Stats in brief: 89-20-00082021006Description: This video is part of the confidentiality vetting support series and presents examples of how to use R to perform the dominance and homogeneity test while using the Census.Release date: 2022-04-27
- Articles and reports: 12-001-X202100100003Description:
One effective way to conduct statistical disclosure control is to use scrambled responses. Scrambled responses can be generated by using a controlled random device. In this paper, we propose using the sample empirical likelihood approach to conduct statistical inference under complex survey design with scrambled responses. Specifically, we propose using a Wilk-type confidence interval for statistical inference. Our proposed method can be used as a general tool for inference with confidential public use survey data files. Asymptotic properties are derived, and the limited simulation study verifies the validity of theory. We further apply the proposed method to some real applications.
Release date: 2021-06-24 - Articles and reports: 12-001-X201700114818Description:
The protection of data confidentiality in tables of magnitude can become extremely difficult when working in a custom tabulation environment. A relatively simple solution consists of perturbing the underlying microdata beforehand, but the negative impact on the accuracy of aggregates can be too high. A perturbative method is proposed that aims to better balance the needs of data protection and data accuracy in such an environment. The method works by processing the data in each cell in layers, applying higher levels of perturbation for the largest values and little or no perturbation for the smallest ones. The method is primarily aimed at protecting personal data, which tend to be less skewed than business data.
Release date: 2017-06-22 - 17. An International Overview of Open Data Experiences ArchivedArticles and reports: 11-522-X201700014719Description:
Open Data initiatives are transforming how governments and other public institutions interact and provide services to their constituents. They increase transparency and value to citizens, reduce inefficiencies and barriers to information, enable data-driven applications that improve public service delivery, and provide public data that can stimulate innovative business opportunities. As one of the first international organizations to adopt an open data policy, the World Bank has been providing guidance and technical expertise to developing countries that are considering or designing their own initiatives. This presentation will give an overview of developments in open data at the international level along with current and future experiences, challenges, and opportunities. Mr. Herzog will discuss the rationales under which governments are embracing open data, demonstrated benefits to both the public and private sectors, the range of different approaches that governments are taking, and the availability of tools for policymakers, with special emphasis on the roles and perspectives of National Statistics Offices within a government-wide initiative.
Release date: 2016-03-24 - 18. Statistics Canada and Open Data ArchivedArticles and reports: 11-522-X201700014720Description:
This paper is intended to give a brief overview of Statistics Canada’s involvement with open data. It will first discuss how the principles of open data are being adopted in the agency’s ongoing dissemination practices. It will then discuss the agency’s involvement with the whole of government open data initiative. This involvement is twofold: Statistics Canada is the major data contributor to the Government of Canada Open Data portal, but also plays an important behind the scenes role as the service provider responsible for developing and maintaining the Open Data portal (which is now part of the wider Open Government portal.)
Release date: 2016-03-24 - 19. Exploring Canada’s Open Government Portal ArchivedArticles and reports: 11-522-X201700014721Description:
Open data is becoming an increasingly important expectation of Canadians, researchers, and developers. Learn how and why the Government of Canada has centralized the distribution of all Government of Canada open data through Open.Canada.ca and how this initiative will continue to support the consumption of statistical information.
Release date: 2016-03-24 - Articles and reports: 11-522-X201700014731Description:
Our study describes various factors that are of concern when evaluating disclosure risk of contextualized microdata and some of the empirical steps that are involved in their assessment. Utilizing synthetic sets of survey respondents, we illustrate how different postulates shape the assessment of risk when considering: (1) estimated probabilities that unidentified geographic areas are represented within a survey; (2) the number of people in the population who share the same personal and contextual identifiers as a respondent; and (3) the anticipated amount of coverage error in census population counts and extant files that provide identifying information (like names and addresses).
Release date: 2016-03-24
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Reference (9)
Reference (9) ((9 results))
- Surveys and statistical programs – Documentation: 32-26-0006Description: 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
- Geographic files and documentation: 12-572-XDescription:
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 - Surveys and statistical programs – Documentation: 11-522-X201300014285Description:
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 ArchivedNotices and consultations: 92-132-XDescription:
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 ArchivedNotices and consultations: 92-131-GDescription:
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 - Surveys and statistical programs – Documentation: 75F0002M2003002Description:
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 - Surveys and statistical programs – Documentation: 75F0002M199303ADescription:
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 - Surveys and statistical programs – Documentation: 75F0002M199303BDescription:
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 - Surveys and statistical programs – Documentation: 75F0002M1995018Description:
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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