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The SIPP Evolution

The SIPP: The Evolution of a Phoenix Population Association of America April 17, 2008 David Johnson. The SIPP Evolution. The Unique Value of SIPP. To provide a nationally representative sample for evaluating: annual and sub-annual dynamics of income

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The SIPP Evolution

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  1. The SIPP: The Evolution of a PhoenixPopulation Association of AmericaApril 17, 2008David Johnson

  2. The SIPP Evolution

  3. The Unique Value of SIPP • To provide a nationally representative sample for evaluating: • annual and sub-annual dynamics of income • movements into and out of government transfer programs • family and social context of individuals and households • interactions between these items

  4. Purpose of SIPP • Recommendation 2-1: The two primary goals for SIPP should be to provide improved information on the distribution of income and other economic resources for people and families and on eligibility for and participation in government assistance programs. Within these two goals, most attention should be paid to improving the information for people who are economically at risk. • The Future of the Survey of Income and Program Participation, NAS, 1993

  5. Recent/Forthcoming SIPP reports • 2004 Marriage and Divorce table package • Dynamics of Economic Well-Being: Movements in the U.S. Income Distribution 2001-2003 • A Child’s Day, 2004, table package • Maternity Leave and Employment Patterns of First-Time Mothers: 1961-2003 • Living Arrangements of Children: 2004 • Who’s Minding the Kids? Child Care Arrangements table package • Providing Support: 2005 table package • Net Worth and Asset Ownership of Households: 2002 • American’s with Disabilities: 2005 • Dynamics of Economic Well-Being: Poverty

  6. Current Uses of SIPP (recent CBO reports)

  7. SIPP 2004 Panel Highlights • Target of 45,000 Household sample • Reduced by half in Sept 2006 (wave 8) and TMs eliminated • Continued collection until Jan 2008 (wave 12) • State representativeness and reliability for 33 states • Reduced seam bias • Currently wave 6 released

  8. SIPP 2008 Panel Highlights • Target of 45,000 Household sample • Wave 1 begins in Sept 2008 • Modified 2004 Panel TM structure • Same Wave 1, 2. Wave 3 TMs on Wave 4, etc. • Collection for 3-4 years • State representativeness and reliability for 20 states • Waves released 9 months after data collection completed

  9. Our work on SIPP Improvements • Improve Processing System and Collection Instrument • Develop Event History Calendar (EHC) Instrument • Examine use of administrative records data to supplement and evaluate survey data • Continue meetings with stakeholders, development of survey content, and use of reimbursable supplements

  10. Timeline for SIPP Development 2007 2008 2009 2010 2011 2012 Sep --- Jan --- May --- Sep --- Jan --- May --- Sep --- Jan --- May --- Sep --- Jan --- May --- Sep --- Jan --- May --- Sep --- Jan 2013 SIPP 2004 Data Gap SIPP 2008 Panel – Waves 1 – 10 collection Waves 11 – 13 SIPP 2004 Panel data release SIPP 2008 Panel – Waves 1 – 13 data release 2008 paper EHC Eval. Analysis 2009 SIPP Re-Engineering Instrument Dev. Systems Tests - Preparation Field Activities Processing and Evaluation 2009 Re-engineered SIPP automated Prototype Reference Period Field Act. 2nd automated prototype Reference Period 2012/13 SIPP Re-Engineering Instrument Refinement Systems Tests - Preparation Field Activities 2013 Reengineered SIPP Reference Period

  11. Improving Processing System • Convert CAPI instrument to BLAISE • Develop processing system in conjunction with survey instrument for reengineered SIPP • Document processing system • Convert from FORTRAN to SAS • Document edit and imputation procedures

  12. Evaluate use of EHC • An EHC interview is centered around a customized calendar that shows the reference period under investigation • The calendar contains timelines for different domains • Landmark events, such as holidays and birthdays can be used to aid the respondent’s memory • Many surveys using EHC – PSID, LAFANS, ELSA

  13. Paper instrument (Control card, EHC, and Assets Questions) Administered April/May 2008 A reinterview evaluation and validation test Reinterview of 2004 panel SIPP respondents to recollect information for calendar year 2007 (about 2000 households) Cases completing Wave 12 of SIPP 2004 Panel (Primed) Sample reduction cases cut after Wave 8 2004 Panel (Un-Primed) Pairwise comparison of responses from the two data sources Validation of responses using administrative records matched at the individual level; assess the occurrence, timing, and distributional differences. Interviewer debriefings and qualitative analyses to refine concepts and training procedures 2008 Paper Test

  14. Screen shot of prototype automated EHC instrument

  15. Screen shot of prototype automated EHC instrument Pop-up with question

  16. Re-engineered Survey Format/Content • Survey Instrument – • Annual administration (Jan/Feb) • BLAISE (plus EHC) • Follow movers • Limited feedback • Content • Responding users indicated a broad need for most of SIPP core content. • Calendar – • Improvement on other designs by integrating more closely with the instrument programming language.

  17. Use of Administrative Records • National-level data • SIPP linked with administrative records data at the person level • Examining imputation methods • Creation of SIPP Synthetic Beta File matched with SSA data • State-level data • Many social programs administered at the state-level • SIPP data linked to social program data from states, e.g., Maryland, Illinois

  18. Stakeholder Meetings and presentations • Association of Public Policy and Management (Nov 2007) • Event History Calendar Conference (Dec 2007) • See http://psidonline.isr.umich.edu/Publications/Workshops/ehc-07papers.html • American Economic Association, Session (Jan 2008) • Population Association of America, Panel (April 2008) • SIPP Small Grants and Workshop (October 2008) • See http://www.npc.umich.edu/opportunities/research_grants/sipp2007/ • ASA Survey Research Methods Committee (Sept 2008) • CNSTAT Panel (Karl Scholz (chair), Pat Ruggles (study director)) (report due fall 2008)

  19. Updating SIPP User Guide URL: http://www.sipp.census.gov/sipp Source: U.S. Census Bureau, Demographics Survey Division,Survey of Income and Program Participation branch Census Bureau Links:Home · Search · Subjects A-Z · FAQs · Data Tools · Catalog · Census 2000 · Quality · Privacy Policy · Contact Us

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