IPUMS-InternationalIPUMS-InternationalFree census samples (microdata) for researchers and Free census samples (microdata) for researchers and
policy makers: policy makers: www.ipums.org/international * * ** * *
Robert McCaa, Minnesota Population CenterRobert McCaa, Minnesota Population [email protected]
see also: see also: www.hist.umn.edu/~rmccaa/IPUMSI/ click: click:
“Tutorials”, “Usage statistics”, “Tutorials”, “Usage statistics”, “World Bank presentation”, etc. “World Bank presentation”, etc.
“Only used statistics are useful statistics.”
……invitation to the 58invitation to the 58thth Session Session ISI: ISI: Dublin, Aug 21-26, 2011Dublin, Aug 21-26, 2011
http://www.isi2011.iehttp://www.isi2011.ie
» IPUMS-International Workshop, IPUMS-International Workshop, Aug 20-21Aug 20-21» New IPUMS initiativesNew IPUMS initiatives» Reports by IPUMS usersReports by IPUMS users» Reports by National Statistical Reports by National Statistical
Office-partners Office-partners » Free and open…Free and open…
» International Statistical Institute, International Statistical Institute, Aug 21-26Aug 21-26
IPUMS-International IPUMS-International dark greendark green = microdata available to users = microdata available to users
(Jun ‘11: 62 countries, 185 censuses, 390 million unit (Jun ‘11: 62 countries, 185 censuses, 390 million unit records)records)
green = preparation (~60 countries, 159 censuses)green = preparation (~60 countries, 159 censuses)light green = participation under consideration light green = participation under consideration
Mollweide projection
IPUMS-International: a global collaboratoryIPUMS-International: a global collaboratory
Microdata
Integrated into IPUMS
Entrusted to IPUMS None entrusted
None inventoried
1.1. What are census microdata (samples)?What are census microdata (samples)?2.2. What do researchers use them for? What do researchers use them for?
http://bibliography.ipums.org 3.3. Who uses IPUMS-International samples? Who uses IPUMS-International samples? 4.4. How do researchers access the microdata? How do researchers access the microdata?
7 tutorials: 7 tutorials: www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explorer.ppt
5.5. How did IPUMS overcome the legal, administrative, technical How did IPUMS overcome the legal, administrative, technical obstacles to disseminate census microdata of 90+ countries? obstacles to disseminate census microdata of 90+ countries?
6.6. Invitation to use microdata and cooperate with IPUMS-I.Invitation to use microdata and cooperate with IPUMS-I.
* Overview ** Overview *Integrating census samples and metadata Integrating census samples and metadata
for research and policy: IPUMS-Internationalfor research and policy: IPUMS-International
1. What are census microdata? 1. What are census microdata? Individual responses to a census.Individual responses to a census.
Each line on this form is one person’s microdata record. Each line on this form is one person’s microdata record.
1.1. Universal population coverageUniversal population coverage
2.2. High precision, confidentialized samples—most drawn to High precision, confidentialized samples—most drawn to IPUMS-International specificationsIPUMS-International specifications
3.3. Samples—microdata and metadata—are integrated: Samples—microdata and metadata—are integrated: identical concepts have the same codes in all samplesidentical concepts have the same codes in all samples
4.4. Facilitate expert analysis of:Facilitate expert analysis of: Fertility and mortality levels: own-child methods, births Fertility and mortality levels: own-child methods, births
and deaths in the household in the past 12 months. and deaths in the household in the past 12 months. Disability and access to health care. Disability and access to health care. Household sanitation variables (water supply, toilet, and Household sanitation variables (water supply, toilet, and
sewage facilities) , Millennium Development Goalssewage facilities) , Millennium Development Goals Employment, Education, etc. Employment, Education, etc.
IPUMS-International: Samples (see card handout)IPUMS-International: Samples (see card handout)
Currently available: 325 million integrated person records Currently available: 325 million integrated person records
in 159 samples, representing 55 countriesin 159 samples, representing 55 countries Annually, samples for 6-8 countries are integrated into the Annually, samples for 6-8 countries are integrated into the
IPUMS-International database.IPUMS-International database. Samples for 2010 round censuses are integrated as they Samples for 2010 round censuses are integrated as they
become availablebecome available Hundred of variables are integrated:Hundred of variables are integrated:
DemographyDemography EducationEducation EmploymentEmployment DisabilityDisability DwellingDwelling
IPUMS-International: IPUMS-International: Census samples for research and policy makingCensus samples for research and policy making
2. What are census samples used for? 2. What are census samples used for? see http://bibliography.ipums.orgsee http://bibliography.ipums.org
Or: www.scholar.google.com Or: www.scholar.google.com IPUMS-International + key-word: subject, country, etc.IPUMS-International + key-word: subject, country, etc.
Research Topics—amazingly diverseResearch Topics—amazingly diverse
» Economists:Economists:» Comparative study of labor force participationComparative study of labor force participation» Demand and supply of public services (water, electricity, sewage, etc.)Demand and supply of public services (water, electricity, sewage, etc.)» Economic impact of family planning and fertility declineEconomic impact of family planning and fertility decline» Brain drain, brain gainBrain drain, brain gain» Discrimination in credit marketsDiscrimination in credit markets» Econometric analysis of labor force and incomeEconometric analysis of labor force and income» Effect of long-term youth unemploymentEffect of long-term youth unemployment» Effects of volume of human capital on returns to educationEffects of volume of human capital on returns to education» Human capital and agingHuman capital and aging» Impact of trade policies on growth, development, immigration, labor Impact of trade policies on growth, development, immigration, labor
markets, and inequalitymarkets, and inequality» Etc.Etc.
3. Who uses IPUMS-International samples?3. Who uses IPUMS-International samples?See sample card for researcher’s country of residenceSee sample card for researcher’s country of residence
www.hist.umn.edu/~rmccaa/IPUMSI click “usage stats”www.hist.umn.edu/~rmccaa/IPUMSI click “usage stats”
Complement one own’s surveys with population data from Complement one own’s surveys with population data from IPUMS-InternationalIPUMS-International
Complement Demographic and Health Surveys or malaria-Complement Demographic and Health Surveys or malaria-treatment datatreatment data
The purpose of IPUMS is to facilitate ready access to unit The purpose of IPUMS is to facilitate ready access to unit record data for analysis—NOT TO REPLACE OTHER record data for analysis—NOT TO REPLACE OTHER DATA!DATA!
IPUMS-International: Unit record data for social IPUMS-International: Unit record data for social science and health research and teachingscience and health research and teaching
1.1. Free, easy access to data for many countries and censusesFree, easy access to data for many countries and censuses2.2. Large sample sizes: Large sample sizes: • Make it possible to include many different variables in a Make it possible to include many different variables in a
regression… multi-level model…regression… multi-level model…• Produce separate estimates for population sub-groupsProduce separate estimates for population sub-groups• Easy to extract samples with a target sample size (e.g., 50mb)Easy to extract samples with a target sample size (e.g., 50mb)• Easy to revise an extract for a larger size or to include more Easy to revise an extract for a larger size or to include more
countries, censuses, variables or sub-populationscountries, censuses, variables or sub-populations2.2. Students show a great deal of creativity in using IPUMS-IStudents show a great deal of creativity in using IPUMS-I3.3. Skills acquired have an immediate pay-off when applying for Skills acquired have an immediate pay-off when applying for
jobs (e.g., World Bank), graduate school, etc.jobs (e.g., World Bank), graduate school, etc.
““IPUMS-I is an excellent resource for teaching…” IPUMS-I is an excellent resource for teaching…” -- -- David Lam, president-elect Pop. Assoc. Amer. David Lam, president-elect Pop. Assoc. Amer.
User registration, conditions of use licenseUser registration, conditions of use license
View variables (integrated metadata)View variables (integrated metadata)
Link to Official Statistical Agency home pagesLink to Official Statistical Agency home pages
View sample descriptions (integrated metadata)View sample descriptions (integrated metadata)
Get data: create a custom-tailored extract: select Get data: create a custom-tailored extract: select countries, years, sub-populations, & variablescountries, years, sub-populations, & variables
Bibliography: add yours; view othersBibliography: add yours; view others
IPUMS web-sitesIPUMS web-sitesare “event-driven”.are “event-driven”.
Surf the siteSurf the site(explore in any order)(explore in any order)
First, click here to explore the IPUMS-International First, click here to explore the IPUMS-International website--or www.ipums.org and click international.website--or www.ipums.org and click international.
Then click a highlighted word for instructions on any of Then click a highlighted word for instructions on any of the 7 tutorials below:the 7 tutorials below:
Register: to access microdataRegister: to access microdata Explore metadata: samples, variables, and sourcesExplore metadata: samples, variables, and sources Get data: create custom-tailored extractsGet data: create custom-tailored extracts Download data and codebooksDownload data and codebooks Study Indian emigrants using IPUMSStudy Indian emigrants using IPUMS
7 tutorials on using the IPUMS-International web-site 7 tutorials on using the IPUMS-International web-site
to obtain census documentation and person recordsto obtain census documentation and person recordshttps://international.ipums.org/international https://international.ipums.org/international
www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explorer.pptwww.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explorer.ppt
Use the extract system to “Select Cases”. Use the extract system to “Select Cases”. Example: DisabilityExample: Disability
First, explore the metadata: First, explore the metadata: variable definition, comparability discussion, etc. variable definition, comparability discussion, etc.
Continue to explore the metadata: Continue to explore the metadata: comparability for specific countriescomparability for specific countries
Continue to explore the metadata: Continue to explore the metadata: comparability for specific countriescomparability for specific countries
Continue to explore the metadata: Continue to explore the metadata: codes and case counts for every sample selectedcodes and case counts for every sample selected
Second: Click the box to include the variable Second: Click the box to include the variable Third: Click “select cases” box Third: Click “select cases” box
Click here, to select Click here, to select every person in every person in households containing households containing an individual with an individual with employment disabilityemployment disability
Fourth: Scroll down, select “disabled”, then Fourth: Scroll down, select “disabled”, then “Continue to next step”“Continue to next step”
6. Invitation to explore, use and cooperate6. Invitation to explore, use and cooperate
» Explore the metadata, microdata and extract system:Explore the metadata, microdata and extract system:» www.ipums.orgwww.ipums.org» www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explore.ppt www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explore.ppt
» In 1999, our dream: integrate samples of 21 countries in 10 In 1999, our dream: integrate samples of 21 countries in 10 yearsyears
» Thanks to generous cooperation of 55 National Statistical OfficesThanks to generous cooperation of 55 National Statistical Offices» Undreamed technological innovationsUndreamed technological innovations
» By 2010, integrated samples for 55 countriesBy 2010, integrated samples for 55 countries» 159 samples, 325 million person records159 samples, 325 million person records» Number of users and usage far exceeded expectationsNumber of users and usage far exceeded expectations
» For the 2010 decade, our dream: For the 2010 decade, our dream: » Double (2x) the number of integrated samples to 300Double (2x) the number of integrated samples to 300» Triple (3x) the number of users to 12,000Triple (3x) the number of users to 12,000» Quadruple (4x) research output Quadruple (4x) research output
The IPUMS-International teamThe IPUMS-International teamMinneapolis Population Center (May 2009) Minneapolis Population Center (May 2009)
Steven Ruggles, inventor of IPUMS, Professor of History, and Director of the Minnesota Population Center
IPUMS-International partners workshopIPUMS-International partners workshop5656thth ISI, Lisbon (Aug 2007 xxxxxxxxxxxxx7) ISI, Lisbon (Aug 2007 xxxxxxxxxxxxx7)Felicien Accrombessy, Benin
(currently applying for a WB position as poverty economist, Cotonou)
