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IPUMS-International Free census samples (microdata) for researchers and policy makers: * * * Robert McCaa, Minnesota Population

Jan 16, 2016



  • IPUMS-InternationalFree census samples (microdata) for researchers and policy makers: * * *Robert McCaa, Minnesota Population [email protected]

    see also: click: Tutorials, Usage statistics, World Bank presentation, etc.

    Only used statistics are useful statistics.

  • invitation to the 58th Session ISI: Dublin, Aug 21-26, 2011 http://www.isi2011.ieIPUMS-International Workshop, Aug 20-21New IPUMS initiativesReports by IPUMS usersReports by National Statistical Office-partners Free and openInternational Statistical Institute, Aug 21-26

  • IPUMS-International dark green = microdata available to users (Jun 11: 62 countries, 185 censuses, 390 million unit records) green = preparation (~60 countries, 159 censuses) light green = participation under consideration Mollweide projectionIPUMS-International: a global collaboratory

  • What are census microdata (samples)?What do researchers use them for? Who uses IPUMS-International samples? How do researchers access the microdata? 7 tutorials: did IPUMS overcome the legal, administrative, technical obstacles to disseminate census microdata of 90+ countries? Invitation to use microdata and cooperate with IPUMS-I.* Overview *Integrating census samples and metadata for research and policy: IPUMS-International

  • 1. What are census microdata? Individual responses to a census. Each line on this form is one persons microdata record.

  • Universal population coverageHigh precision, confidentialized samplesmost drawn to IPUMS-International specificationsSamplesmicrodata and metadataare integrated: identical concepts have the same codes in all samplesFacilitate expert analysis of:Fertility and mortality levels: own-child methods, births and deaths in thehousehold in the past 12 months. Disability and access to health care. Household sanitation variables (water supply, toilet, and sewage facilities), Millennium Development GoalsEmployment, Education, etc.IPUMS-International: Samples (see card handout)

  • Currently available: 325 million integrated person records in 159 samples, representing 55 countriesAnnually, samples for 6-8 countries are integrated into the IPUMS-International database.Samples for 2010 round censuses are integrated as they become availableHundred of variables are integrated:DemographyEducationEmploymentDisabilityDwellingIPUMS-International: Census samples for research and policy making

  • 2. What are census samples used for? see

  • Or: IPUMS-International + key-word: subject, country, etc.

  • Research Topicsamazingly diverseEconomists:Comparative study of labor force participationDemand and supply of public services (water, electricity, sewage, etc.)Economic impact of family planning and fertility declineBrain drain, brain gainDiscrimination in credit marketsEconometric analysis of labor force and incomeEffect of long-term youth unemploymentEffects of volume of human capital on returns to educationHuman capital and agingImpact of trade policies on growth, development, immigration, labor markets, and inequalityEtc.

  • 3. Who uses IPUMS-International samples?See sample card for researchers country of click usage stats

  • Complement one owns surveys with population data from IPUMS-InternationalComplement Demographic and Health Surveys or malaria-treatment dataThe purpose of IPUMS is to facilitate ready access to unit record data for analysisNOT TO REPLACE OTHER DATA!IPUMS-International: Unit record data for social science and health research and teaching

  • Free, easy access to data for many countries and censusesLarge sample sizes: Make it possible to include many different variables in a regression multi-level modelProduce separate estimates for population sub-groupsEasy to extract samples with a target sample size (e.g., 50mb)Easy to revise an extract for a larger size or to include more countries, censuses, variables or sub-populationsStudents show a great deal of creativity in using IPUMS-ISkills acquired have an immediate pay-off when applying for jobs (e.g., World Bank), graduate school, etc.

    IPUMS-I is an excellent resource for teaching -- David Lam, president-elect Pop. Assoc. Amer.

  • 4. How do researchers access the data? RegisterCreate an extractDownload extractAnalyze with SAS, STATA, SPSS, R, etc.

  • User registration, conditions of use licenseView variables (integrated metadata)Link to Official Statistical Agency home pagesView sample descriptions (integrated metadata)Get data: create a custom-tailored extract: select countries, years, sub-populations, & variablesBibliography: add yours; view othersIPUMS web-sites are event-driven. Surf the site (explore in any order)

  • First, click here to explore the IPUMS-International website--or and click international.Then click a highlighted word for instructions on any of the 7 tutorials below:Register: to access microdataExplore metadata: samples, variables, and sourcesGet data: create custom-tailored extractsDownload data and codebooksStudy Indian emigrants using IPUMS

    7 tutorials on using the IPUMS-International web-site to obtain census documentation and person records

  • Use the extract system to Select Cases. Example: Disability

  • First, explore the metadata: variable definition, comparability discussion, etc.

  • Continue to explore the metadata: comparability for specific countries

  • Continue to explore the metadata: comparability for specific countries

  • Continue to explore the metadata: codes and case counts for every sample selected

  • Second: Click the box to include the variable Third: Click select cases box

  • Click here, to select every person in households containing an individual with employment disabilityFourth: Scroll down, select disabled, then Continue to next step

  • Legal: negotiate uniform Memorandum of Understanding with each partnerAdministrative: hold each user and each users institution responsible for enforcing conditions of useTechnicaluniform procedures:Draw samples: every 10th householdConfidentialize: best practiceIntegrate: both metadata and microdataDisseminate: world-wide, free of charge5. How does IPUMS overcome the obstacles

  • 6. Invitation to explore, use and cooperateExplore the metadata, microdata and extract In 1999, our dream: integrate samples of 21 countries in 10 yearsThanks to generous cooperation of 55 National Statistical OfficesUndreamed technological innovationsBy 2010, integrated samples for 55 countries159 samples, 325 million person recordsNumber of users and usage far exceeded expectationsFor the 2010 decade, our dream: Double (2x) the number of integrated samples to 300Triple (3x) the number of users to 12,000Quadruple (4x) research output

  • The IPUMS-International team Minneapolis Population Center (May 2009) Steven Ruggles, inventor of IPUMS, Professor of History, and Director of the Minnesota Population Center

  • IPUMS-International partners workshop 56th ISI, Lisbon (Aug 2007 xxxxxxxxxxxxx7)Felicien Accrombessy, Benin (currently applying for a WB position as poverty economist, Cotonou)

  • Thank you [email protected]