1 / 33

Using IPUMS

Using IPUMS.org. Katie Genadek Minnesota Population Center University of Minnesota kgenadek@umn.edu. The IPUMS projects are funded by the National Science Foundation and the National Institutes of Health. 00:00. Overview. What is IPUMS? Microdata and Summary Data IPUMS-USA IPUMS-CPS

lara
Download Presentation

Using IPUMS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Using IPUMS.org Katie Genadek Minnesota Population Center University of Minnesota kgenadek@umn.edu The IPUMS projects are funded by the National Science Foundation and the National Institutes of Health 00:00

  2. Overview • What is IPUMS? • Microdata and Summary Data • IPUMS-USA • IPUMS-CPS • Online Analysis System • Online Demonstration • Questions 00:44

  3. What is IPUMS? Integrated - consistent codes, labels, and documentation Public Use - anonymized, downloadable Microdata - individual-level Series - pooled data over time and place 1:26

  4. But, What is IPUMS Data? Individual level: Demographic Data Census Data Survey Data Health Data Historical Data Migration Data Time Use Data Summary level: Demographic Data Census Data Historical Data Mapping Data 2:09

  5. MPC Data Projects http://www.ipums.org/ 2:41

  6. Microdata: MICRODATA AND SUMMARY DATA 4:40

  7. Microdata versus Summary Data Microdata Summary Data • Shows full range of responses for individuals • Enable custom tables and sophisticated analyses • Suppression: geography, truncation, and item level suppression • Premade or published tables of aggregate characteristics • Enable examination of small geographic areas • Suppression: limited content, grouped intervals, and cell suppression 4:40

  8. Summary Data 5:44

  9. Age Birthplace Mother’s birthplace Sex Relationship Race Occupation IPUMS Data Structure Household record (shaded) followed by a person record for each member of the household For each type of record, columns correspond to specific variables 5:54

  10. Microdata Data: IPUMS-USA 6:50

  11. IPUMS-USA • Database includes public use microdata samples: • U.S. decennial censuses (1850-2000) • Complete-count dataset for 1880 • Linked Samples 1850 – 1930 • Samples from Puerto Rico (1910-2008) • American Community Survey (2000-2009) • The first MPC data project • Most widely used database ~ 30,000 users 6:53

  12. Census Samples 8:31

  13. The American Community Survey • Replaced the long form of the Decennial Census • Demonstration stage: 2000 to 2004 • Full implementation 2005, group quarters added 2006 • Rolling sample design Microdata samples: • Full survey responses for 1% of US population • Yearly samples, multi-year samples 9:18

  14. ACS Samples 10:03

  15. Census and ACS Variable Topics • Basic demographic • Marriage • Family structure • Fertility • Ethnicity • Disability • Education • Work • Income • Migration • Housing Characteristics 10:13

  16. Geography Limitations • No confidentiality restrictions for samples prior to 1940 – no geographic limitation • Samples from 1940-1970 • Limited and inconsistent geographic identifiers • Recent samples: • State • Some Metropolitan Areas • County Groups • Public Use Microdata Areas (PUMAs) 10:43

  17. What are PUMAs? • Public Use Microdata Areas (PUMAs) • Comprised of approximately 100,000 persons • Boundaries do not always align with jurisdictional boundaries • Detailed contents and maps available • GIS shape files for PUMAs available 11:26

  18. Microdata Data: IPUMS-CPS 11:53

  19. Current Population Survey (CPS) • Administered starting 1940 • Monthly survey administered by the Bureau of Labor Statistics • Household survey was designed to measure unemployment • Source of the official Government statistics on employment and unemployment • In 2009 - 57,000 households interviewed monthly 11:55

  20. Current Population SurveyMarch Supplement • All March respondents • Additional respondents from February, March and November monthly samples • Data are collected for Armed Forces members residing with their families • March Annual Social and Economic Supplement is the most widely used by social scientists and policymakers 12:20

  21. Current Population SurveyMarch Supplement • Labor force participation and unemployment • Work experience and educational attainment • Sources of income including non-cash benefits • Program participation • Tax filing status • Health Insurance • Migration 12:51

  22. IPUMS - CPS • All March Data (Back to 1962) • Basic Monthly Surveys • Samples from 2000-2008 (back to 1976 soon) • Data for every month • ~50,000 households surveyed each month • Less variables than March supplement • Demographic information • Family characteristics • Employment status • Education information 13:16

  23. Obtaining Data: ONLINE ANALYSIS SYSTEM 14:26

  24. Online Analysis System • High-speed tabulation software developed at UC-Berkeley • Allows for analysis of microdata without statistical package • All analysis performed online • Can analyze multiple years of data • Help guides on webpage 14:26

  25. Features • Data analysis capabilities • Frequencies and cross tabulations (including charts) • Comparisons of means (with complex std errors) • Correlation matrix • Comparisons of correlations • Regression (ordinary least squares) • Logit and probit regression • List values of individual cases 15:02

  26. Where is this online tabulator? • Follow the link ‘Analyze Data Online’ from the homepage of: • usa.ipums.org/usa/ • cps.ipums.org/cps/ • Select all samples of year of interest in USA • Open IPUMS-USA or CPS in additional tab for documentation 15:41

  27. Obtaining Data: USE THIS DATA 16:00

  28. Microdata for Analysis • Documentation is Important!!! • Use the IPUMS documentation • Be aware of top/bottom codes, NIU codes, and missing data codes • Know the universe – who got asked the question • Weights – makes estimates representative • See additional weights presentation • Sample size is important • Check analysis without weights 16:01

  29. Microdata for Analysis • Allows more complex analysis then summary data • Geographic Restrictions • State Level Analysis • Metro Area level Analysis • Time series – change over time • Not downloading tons of tables 18:43

  30. IPUMS is Awesome • Comprehensive online documentation • Integration makes analyzing change over time possible • Data analysis system allows you access the data and analyze it online • All of the data are available for free online • User support is available by e-mail to help you as needed 19:31

  31. Social Explorer - Shout Out • Produces online maps and data reports • Based on boundary files made available through NHGIS • Map changes in census data over time • http://www.socialexplorer.com/ 20:23

  32. Obtaining Data: DISCUSSION OF “WEIGHTING” ANDONLINE DEMO OF IPUMS 20:54

  33. Questions – email usIPUMS User Support ipums@umn.eduContact:Katie Genadekkgenadek@umn.edu 32:00

More Related