* IPUMS-International * * IPUMS-International * Using Integrated unit records for demographic and Using Integrated unit records for demographic and

health research:health research:Local, regional, national, and internationalLocal, regional, national, and international

* * ** * *Robert McCaa, Minnesota Population CenterRobert McCaa, Minnesota Population Center

rmccaa@umn.edu

www.ipums.org/international see also: see also: www.hist.umn.edu/~rmccaa/ipums_iassh.ppt

1.1. 7 tutorials: 7 tutorials: www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explorer.ppt

2.2. Note to Indian researchersNote to Indian researchers3.3. IPUMS-International: Unit record data for the social sciences IPUMS-International: Unit record data for the social sciences

and health research and teachingand health research and teaching4.4. How to select cases (see “Step 4” in the brouchure) How to select cases (see “Step 4” in the brouchure) 5.5. How to customize sample sizes (see “Step 5” in the brouchure)How to customize sample sizes (see “Step 5” in the brouchure)6.6. Usage statistics and publicationsUsage statistics and publications7.7. Invitation to use and cooperate Invitation to use and cooperate

* Outline ** Outline *Integrating census samples and metadata Integrating census samples and metadata

for research and policy: IPUMS-Internationalfor research and policy: IPUMS-InternationalUniversity of Minnesota Population CenterUniversity of Minnesota Population Center

First, First, click here to explore the IPUMS-International to explore the IPUMS-International website--or website--or www.ipums.org and click international. 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 microdata: 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

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”.

Click a link to explore Click a link to explore in any order.in any order.

1960+1960+

1850-20091850-2009

1880 100%!!1880 100%!!

1790+1790+

1960+1960+

2003+2003+

1962+1962+

www.ipums.orgwww.ipums.org

5 USA-only databases5 USA-only databases

All use the same extract All use the same extract engine and featuresengine and features

Microdata of India in IPUMS: NSSO Schedule 10 samples Microdata of India in IPUMS: NSSO Schedule 10 samples

under MOU with MOSPIunder MOU with MOSPI In 1999, the RG of India was invited to be a founding In 1999, the RG of India was invited to be a founding

member of IPUMS-Internationalmember of IPUMS-International To date, with 90 official statistical offices participating…The To date, with 90 official statistical offices participating…The

Government of India has not yet decided to participate--Government of India has not yet decided to participate--discussions continuediscussions continue

A lesson in Indian democracy from the prime minister’s A lesson in Indian democracy from the prime minister’s office (Sept. 2005): organize academic supportoffice (Sept. 2005): organize academic support

With your support, success—samples for 1991, 2001 and With your support, success—samples for 1991, 2001 and ultimately 2011—may be possible ultimately 2011—may be possible

2. Special Note to Indian Researchers:2. Special Note to Indian Researchers:

What are microdata? What are microdata? They are the individual They are the individual responses to a survey, responses to a survey, such as: NSS Sch. 10 such as: NSS Sch. 10

(1983).(1983).Each line on the form Each line on the form is one unit (microdata) is one unit (microdata)

record. record.

325 million integrated person records in 159 samples, 325 million integrated person records in 159 samples,

representing 55 countriesrepresenting 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:

DemographicDemographic EducationEducation EconomicEconomic DisabilityDisability DwellingDwelling

3. IPUMS-International: Unit record data for social 3. IPUMS-International: Unit record data for social science and health research and teachingscience and health research and teaching

IPUMS-International IPUMS-International dark greendark green = microdata available to users = microdata available to users

(Jun ‘11: 60 countries, 181 censuses, 390 million unit (Jun ‘11: 60 countries, 181 censuses, 390 million unit records)records)

green = preparation (30 countries, 80 censuses)green = preparation (30 countries, 80 censuses)light green = participation under consideration light green = participation under consideration

Mollweide projection

IPUMS-International: a global collaboratoryIPUMS-International: a global collaboratory

Founding membersFounding members

CB, USACB, USA

INSSE, FranceINSSE, France

INEGI, MexicoINEGI, Mexico

ONS-UKONS-UK

IBGE, BrazilIBGE, Brazil

NBS, ChinaNBS, China

CSO, IndiaCSO, India

CBS, VietnamCBS, Vietnam

PCO, Pakistan, PCO, Pakistan,

Statistics CanadaStatistics Canada

>90 in total>90 in total

>5 thousand users>5 thousand users

India: 13India: 13thth in users in users

NSSO samples:NSSO samples: 26 26thth in usage in usage

Samples are integrated: identical concepts have the same Samples are integrated: identical concepts have the same

codes in all samplescodes in all samples   Universal population coverage and large sample sizes Universal population coverage and large sample sizes Robust analysis of Robust analysis of

Fertility and mortality levels: own-child methods, Fertility and mortality levels: own-child methods, reports on births and deaths in the household in the past reports on births and deaths in the household in the past 12 months.  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) to track progress toward Millennium sewage facilities) to track progress toward Millennium Development Goals. Development Goals. 

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

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.

4. How to “Select Cases”. Example: Disability4. How to “Select Cases”. Example: DisabilityFirst, explore the metadata: First, explore the metadata:

list of variables for selected countrieslist of variables for selected countries

Continue to explore the metadata: Continue to 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 a every person in a household containing a household containing a person born in Indiaperson born in India

Fourth: Scroll down, select “India”, then Fourth: Scroll down, select “India”, then “Continue to next step”“Continue to next step”

Step 5. Customize sample sizeStep 5. Customize sample sizeIf sample size is too large, click “customize”, If sample size is too large, click “customize”,

otherwise “Continue to next step”otherwise “Continue to next step”

Tip: do a small test.Tip: do a small test.Customize at 0.1% Customize at 0.1% If this works, then revise the extract and If this works, then revise the extract and customize to 1%, 10% or whatevercustomize to 1%, 10% or whatever

Step 5. Customize sample sizeStep 5. Customize sample sizeEnter a number (thousands) or % to change Enter a number (thousands) or % to change

any or all samples (=>10k households)any or all samples (=>10k households)

Extract engine recomputes Extract engine recomputes weights/expansion factorsweights/expansion factors

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

A final note:A final note:Not all data are integrated. Special modules Not all data are integrated. Special modules

on fertility, mortality and migrationon fertility, mortality and migration

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

Thank youThank you

rmccaa@umn.edurmccaa@umn.edu

www.ipums.org/internationalwww.ipums.org/international