* IPUMS-International * Using Integrated unit records for demographic and health research: Local, regional, national, and international * * * Robert McCaa, Minnesota Population Center see also:

1. 7 tutorials: Note to Indian researchers 3. IPUMS-International: Unit record data for the social sciences and health research and teaching 4. How to select cases (see “Step 4” in the brouchure) 5. How to customize sample sizes (see “Step 5” in the brouchure) 6. Usage statistics and publications 7. Invitation to use and cooperate * Outline * Integrating census samples and metadata for research and policy: IPUMS-International University of Minnesota Population Center

First, click here to explore the IPUMS-International website--or and click international. click here here Then click a highlighted word for instructions on any of the 7 tutorials below:  Register: to access microdata Register  Explore metadata: samples, variables, and sources samplesvariablessourcessamplesvariablessources  Get data: create custom-tailored extracts Get data Get data  Download data and codebooks Download data Download data  Study Indian emigrants using IPUMS Study Indian emigrants Study Indian emigrants 7 tutorials on using the IPUMS-International web-site to obtain census documentation and person records

User registration, conditions of use license View variables (integrated metadata) Link to Official Statistical Agency home pages View sample descriptions (integrated metadata) Get data: create a custom-tailored extract: select countries, years, sub-populations, & variables Bibliography: add yours; view others IPUMS web-sites are “event-driven”. Click a link to explore in any order.

%!! USA-only databases 5 USA-only databases All use the same extract engine and features All use the same extract engine and features

 Microdata of India in IPUMS: NSSO Schedule 10 samples under MOU with MOSPI  In 1999, the RG of India was invited to be a founding member of IPUMS-International  To date, with 90 official statistical offices participating…The Government of India has not yet decided to participate-- discussions continue  A lesson in Indian democracy from the prime minister’s office (Sept. 2005): organize academic support  With your support, success—samples for 1991, 2001 and ultimately 2011—may be possible 2. Special Note to Indian Researchers:

What are microdata? They are the individual responses to a survey, such as: NSS Sch. 10 (1983). Each line on the form is one unit (microdata) record.

 325 million integrated person records in 159 samples, representing 55 countries  Annually, samples for 6-8 countries are integrated into the IPUMS-International database.  Samples for 2010 round censuses are integrated as they become available  Hundred of variables are integrated:  Demographic  Education  Economic  Disability  Dwelling 3. IPUMS-International: Unit record data for social science and health research and teaching

IPUMS-International dark green = microdata available to users (Jun ‘11: 60 countries, 181 censuses, 390 million unit records) green = preparation (30 countries, 80 censuses) light green = participation under consideration Mollweide projection IPUMS-International: a global collaboratory Founding members CB, USA INSSE, France INEGI, Mexico ONS-UK IBGE, Brazil NBS, China CSO, India CBS, Vietnam PCO, Pakistan, Statistics Canada >90 in total >5 thousand users India: 13 th in users NSSO samples: 26 th in usage NSSO samples: 26 th in usage

 Samples are integrated: identical concepts have the same codes in all samples  Samples are integrated: identical concepts have the same codes in all samples  Universal population coverage and large sample sizes  Robust analysis of  Fertility and mortality levels: own-child methods, reports on births and deaths in the household in the past 12 months.  Fertility and mortality levels: own-child methods, reports on births 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 sewage facilities) to track progress toward Millennium Development Goals.  Household sanitation variables (water supply, toilet, and sewage facilities) to track progress toward Millennium Development Goals. IPUMS-International: Unit record data for social science and health research and teaching

 Complement one own’s surveys with population data from IPUMS-International  Complement Demographic and Health Surveys or malaria- treatment data  The purpose of IPUMS is to facilitate ready access to unit record data for analysis—NOT TO REPLACE OTHER DATA! IPUMS-International: Unit record data for social science and health research and teaching

1. Free, easy access to data for many countries and censuses 2. Large sample sizes: Make it possible to include many different variables in a regression… multi-level model… Make it possible to include many different variables in a regression… multi-level model… Produce separate estimates for population sub-groups Produce 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 countries, censuses, variables or sub-populations Easy to revise an extract for a larger size or to include more countries, censuses, variables or sub-populations 2. Students show a great deal of creativity in using IPUMS-I 3. Skills 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 to “Select Cases”. Example: Disability First, explore the metadata: list of variables for selected countries

Continue to explore the metadata: variable definition, comparability discussion, etc.

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 a household containing a person born in India Fourth: Scroll down, select “India”, then “Continue to next step”

Step 5. Customize sample size If sample size is too large, click “customize”, otherwise “Continue to next step” Tip: do a small test. Customize at 0.1% If this works, then revise the extract and customize to 1%, 10% or whatever

Step 5. Customize sample size Enter a number (thousands) or % to change any or all samples (=>10k households) Extract engine recomputes weights/expansion factors

6. Invitation to explore, use and cooperate » Explore the metadata, microdata and extract system: » » » In 1999, our dream: integrate samples of 21 countries in 10 years » Thanks to generous cooperation of 55 National Statistical Offices » Undreamed technological innovations » By 2010, integrated samples for 55 countries » 159 samples, 325 million person records » Number of users and usage far exceeded expectations » For the 2010 decade, our dream: » Double (2x) the number of integrated samples to 300 » Triple (3x) the number of users to 12,000 » Quadruple (4x) research output

A final note: Not all data are integrated. Special modules on fertility, mortality and migration

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

Thank you