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Longitudinal data

Longitudinal data. Sunny Kaniyathu, Data Services Librarian. Soc 332.6 : Principles of Research Design. Longitudinal Data. Data observed over time as well as across units Units: individuals, firms, provinces, countries, etc. Combines Time Series with Cross-sectional data Time series

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Longitudinal data

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  1. Longitudinal data Sunny Kaniyathu, Data Services Librarian Soc 332.6 : Principles of Research Design

  2. Longitudinal Data • Data observed over time as well as across units • Units: individuals, firms, provinces, countries, etc. • Combines Time Series with Cross-sectional data • Time series • Data for a unit measured at uniform time intervals • Cross-sectional data • Data across units measured at a particular time point

  3. Longitudinal Data Structure Source: ESRC - Longitudinal Data Analysis for Social Science Researchers [http://www.longitudinal.stir.ac.uk/publications.html]

  4. Data: Statistics Canada • Single data producer but multiple access points • Not every access point provides access to all data • Exception: Buy data directly from Statistics Canada • Data available for free under DLI License • DLI: Data Liberation Initiative

  5. Sources and access points • Relevant data sources • CANSIM: Comprehensive Canadian socioeconomic database • Collection of data from various surveys • Census of Canada • Population survey conducted every five years • Access Points • Statistics Canada website • Some data can be downloaded • Several dissemination platforms

  6. Access: Statistics Canada website • Main Catalogue • Browse surveys and locate tables • Find survey related documentation and analytical studies • Obtain CANSIM numbers for data tables

  7. Statistics Canada Catalogue

  8. Search by Surveys

  9. Related products

  10. Search by Subject • Find all resources under a given subject

  11. Data via other platforms • Access to platforms: Data and GIS Library Services • CANSIM on CHASS / E-STAT • CHASS updated weekly [Wednesdays] • E-STAT • Updated yearly • Some data series may be aggregated • for example: yearly versus monthly data • Contains some census data

  12. Access to Platforms

  13. CANSIM on CHASS

  14. In SPSS format

  15. CANSIM [contd.] • Search by subjects • Search by surveys

  16. Data via other platforms [contd.] • Retrieve complete surveys [DLI collection] • PUMF – Public Use Master Files • Not raw data [RDC]

  17. Data via other platforms [contd.] • EQUINOX • Data in SPSS, STATA, SAS, IVT formats • IVT format: requires Beyond 20/20 browser • Free Download • Browser User Guide • Data can be saved in other formats • Windows only

  18. EQUINOX

  19. SPSS Example

  20. Beyond 20/20 browser • Example: Uniform Crime Reporting Survey • File in .IVT format

  21. Data via other platforms [contd.] • NESSTAR • Data can be viewed, not downloaded • For data downloads, contact Data Services • Detailed metadata including variable definitions and documentation • View frequency distributions for variables

  22. NESSTAR

  23. Census Data • E-STAT • Community Profiles: Statistics Canada website • Canadian Census Analyzer • EQUINOX • PUMF files and profile tables

  24. Community Profiles

  25. Canadian Census Analyzer

  26. Data and GIS Library Services • Available: all DLI data • Primary Contact: • Sunny Kaniyathu: 306 966 8841; sunny.kaniyathu@usask.ca • Secondary Contact(s): • Winnie Smit: 306 966 7261; winnie.smit@usask.ca • Robert Alary: 306 966 5987; robert.alary@usask.ca • Website: http://library.usask.ca/murray/data-and-gis/contact/dls-staff.php

  27. Useful publications/ links • Canadian Social Trends • Canada at a Glance • Canada Year Book • Historical Statistics of Canada • Census 2006 Dictionary/ Index • Statistics Canada Thesaurus • Standard Geographical Classification (Vol. I) • Survey Methods and Practices • Survey Methodology • Citing Statistics Canada Data

  28. Useful links • Data and Statistics LibGuide • Data Library Services

  29. Questions?

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