1. IPUMS-International Free census samples (microdata) for researchers and policy makers: www.ipums.org/international * * * Robert McCaa, Minnesota Population Center rmccaa@umn.edu see also: www.hist.umn.edu/~rmccaa/IPUMSI/ click: “Tutorials”, “Usage statistics”, “World Bank presentation”, etc. IPUMS-International Free census samples (microdata) for researchers and policy makers: www.ipums.org/international * * * Robert McCaa, Minnesota Population Center rmccaa@umn.edu see also: www.hist.umn.edu/~rmccaa/IPUMSI/ click: “Tutorials”, “Usage statistics”, “World Bank presentation”, etc. “Only used statistics are useful statistics.” www.ipums.org/international rmccaa@umn.eduwww.hist.umn.edu/~rmccaa/IPUMSI/ www.ipums.org/international rmccaa@umn.eduwww.hist.umn.edu/~rmccaa/IPUMSI/

2. …invitation to the 58 th Session ISI: Dublin, Aug 21-26, 2011 http://www.isi2011.ie » IPUMS-International Workshop, Aug 20-21 » New IPUMS initiatives » Reports by IPUMS users » Reports by National Statistical Office-partners » Free and open… » International Statistical Institute, Aug 21-26

3. 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 projection IPUMS-International: a global collaboratory

4. 1. What are census microdata (samples)? 2. What do researchers use them for? http://bibliography.ipums.org http://bibliography.ipums.org 3. Who uses IPUMS-International samples? 4. How do researchers access the microdata? 7 tutorials: www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explorer.ppt www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explorer.ppt 5. How did IPUMS overcome the legal, administrative, technical obstacles to disseminate census microdata of 90+ countries? 6. Invitation to use microdata and cooperate with IPUMS-I. * Overview * Integrating census samples and metadata for research and policy: IPUMS-International

5. 1. What are census microdata? Individual responses to a census. Each line on this form is one person’s microdata record.

6. 1. Universal population coverage 2. High precision, confidentialized samples—most drawn to IPUMS-International specifications 3. Samples—microdata and metadata—are integrated: identical concepts have the same codes in all samples 3. Samples—microdata and metadata—are integrated: identical concepts have the same codes in all samples 4. Facilitate expert analysis of:  Fertility and mortality levels: own-child methods, births and deaths in the household in the past 12 months.  Fertility and mortality levels: own-child methods, 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), Millennium Development Goals  Employment, Education, etc.  Employment, Education, etc. IPUMS-International: Samples (see card handout)

7.  Currently available: 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:  Demography  Education  Employment  Disability  Dwelling IPUMS-International: Census samples for research and policy making

8. 2. What are census samples used for? see http://bibliography.ipums.org

9. Or: www.scholar.google.com IPUMS-International + key-word: subject, country, etc.

10. Research Topics—amazingly diverse » Economists: » Comparative study of labor force participation » Demand and supply of public services (water, electricity, sewage, etc.) » Economic impact of family planning and fertility decline » Brain drain, brain gain » Discrimination in credit markets » Econometric analysis of labor force and income » Effect of long-term youth unemployment » Effects of volume of human capital on returns to education » Human capital and aging » Impact of trade policies on growth, development, immigration, labor markets, and inequality » Etc.

11. 3. Who uses IPUMS-International samples? See sample card for researcher’s country of residence www.hist.umn.edu/~rmccaa/IPUMSI click “usage stats”

12.  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

13. 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.

14. 4. How do researchers access the data? www.ipums.org/international www.ipums.org/international 1. Register 2. Create an extract 3. Download extract 4. Analyze with SAS, STATA, SPSS, R, etc.

15. 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”. Surf the site (explore in any order)

16. First, click here to explore the IPUMS-International website--or www.ipums.org and click international. click here www.ipums.orgclick here www.ipums.org 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 https://international.ipums.org/international https://international.ipums.org/international www.hist.umn.edu/~rmccaa/IPUMSI/ipumsi_explorer.ppt

17. Use the extract system to “Select Cases”. Example: Disability

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

19. Continue to explore the metadata: comparability for specific countries

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

22. Second: Click the box to include the variable Third: Click “select cases” box

23. Click here, to select every person in households containing an individual with employment disability Fourth: Scroll down, select “disabled”, then “Continue to next step”

24. 1. Legal: negotiate uniform Memorandum of Understanding with each partner 2. Administrative: hold each user and each user’s institution responsible for enforcing conditions of use 3. Technical—uniform procedures: Draw samples: every 10 th household Draw samples: every 10 th household Confidentialize: best practice Confidentialize: best practice Integrate: both metadata and microdata Integrate: both metadata and microdata Disseminate: world-wide, free of charge Disseminate: world-wide, free of charge 5. How does IPUMS overcome the obstacles

25. 6. Invitation to explore, use and cooperate » Explore the metadata, microdata and extract system: » www.ipums.org www.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 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

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

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

28. Thank you rmccaa@umn.edu www.ipums.org/international rmccaa@umn.edu www.ipums.org/international rmccaa@umn.edu www.ipums.org/international