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Extracting and Analyzing IPUMS Data for Poverty Research

This workshop focuses on extracting and analyzing IPUMS data to study poverty using statistical software. Participants will learn about various models, including regression analysis, utilizing recoded variables and concatenated files from 1850 to 2007. Attendees will understand how to select variables based on given criteria and produce outputs such as means and regression results using software like SAS, SPSS, or Stata. The final product includes data files, codebooks, and setup statements for effective data manipulation.

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Extracting and Analyzing IPUMS Data for Poverty Research

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  1. IPUMS Extract Exercise Lisa Neidert Poverty/American Community Survey Workshop June 22-26, 2009

  2. Purpose of extracting data • Modeling • Regressions, etc. • Recodes • In familiar statistical package

  3. IPUMS • Same data we have used with PDQ-Explore • Concatenated file • 1850-2007 • Can select one year or many • Final product is: • Data (compressed) • Codebook • Set-up statements

  4. Strategy • Do simple extract • Download • Uncompress data • Modify set-up statement • Produce means and regression in statistical package of choice • SAS, SPSS, stata • Go back and produce ‘real’ extract • Take time choosing variables

  5. Variables • http://usa.ipums.org/usa/VariableGroups.do • Variables arranged by Subject • General version • Detailed version

  6. Variables included in my extract • hhwt (default) • perwt (default) • age [25-54] • sex [males] • race [white, black] • incearn • poverty

  7. Sample selections • Exclude incearn < 1

  8. Recodes • L_Earn = Log(Incearn) • White (dummy variable) • A2 = Age*Age • Interaction terms (with white) • W_Age • W_Age2

  9. Download/Unzip data • If zipped file does not have an icon associated with it, your PC is missing software • Solution • Use my PC • Copy to gift flash drive

  10. Modify program • SAS wants you to identify: • Work area • Data location • Desktop location as a path is: • 'c:\Documents and Settings\lisan\Desktop’ • 'c:\Documents and Settings\lisan\ Desktop\ipums_2009.dat'

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