 report includes several monthly longitudinal measures that analyze monthly observations for individuals and families across multiple years. These measures are based on the SIPP and provide information on the number of consecutive months receiving welfare benefits (see Indicators 7 and 8) and the number of consecutive months poor (see ECON 5) during multi-year time periods.
Note that annual estimates provided throughout the report represent calendar years except where explicitly noted as fiscal years. Please see footnotes to each table in the report for further technical information and documentation of time period measurement issues.
Unit of Analysis
The individual, rather than the family or household, is the unit of analysis for most of the statistics in this report. The individual’s dependency status, however, is based on total family income, taking into account means-tested assistance, earnings and other sources of income for all individuals in the family.25 The introductory chapter of this report and our dependence indicators in Chapter II, for example, show the percentage of individuals that are dependent (see SUM 1, Indicator 1, and Indicator 6) according to annual total family income (including annual total family benefit receipt). This is similar to estimates of the number of individuals who are poor, which are based on the characteristics and total income of the family in which they live (see ECON 1, 2, 3, 4, and 5).
Recipiency status also is based on total annual family benefit receipt and income in some instances; in SUM 1, for example, recipients are individuals in families where at least one family member receives assistance from AFDC/TANF, SNAP or SSI at some point in the year. In most other indicators, however, recipiency is measured as the direct receipt of a benefit by an individual in a month (see Indicators 7 and 8), an average month across a given year (see Indicators 2, 3, 4, and 5) or at some point within a year (see Indicators 6 and 9). Note that the differences between individual and family measures of recipiency are largest in the SSI program, which provides benefits to individuals and couples, not to families.
Spells of program recipiency (Indicator 7), spells of welfare receipt with no attachment to the labor market (IND 8) and spells of poverty (ECON 5) are limited to those spells that begin during the SIPP panel of observation. Spells separated by only 1 month are not considered separate spells. If an individual has two or more spells of dependency, receipt, or poverty, each is counted separately in the analysis.
Data Source for Dependency Measure
Beginning with the 2001 report, there was a shift to using CPS rather than SIPP data for our main welfare dependency measure (as well as several other indicators and predictors of welfare recipiency and dependence). This change was necessary because CPS data are updated annually, while SIPP updates are available less frequently.
The CPS data have been widely used to measure trends since the welfare reform legislation of 1996. However, because the CPS does not collect income information in the same detail as the SIPP, it has been subject to criticism for higher levels of underreporting of income, particularly welfare income. To address this concern, our measure of dependency (as well as some of the other indicators in this report) are based on CPS data that have been analyzed by the Transfer Income Model (TRIM3), a microsimulation model developed by the Urban Institute under contract to the Office of the Assistant Secretary for Planning and Evaluation. Although its primary purpose is to simulate program eligibility and the impact of policy proposals, the TRIM3 model also has been used to correct for underreporting of welfare receipt and benefits. Welfare caseloads in TRIM3 are based on CPS data, adjusted upward to ensure that total estimates of recipients equal the total counts from administrative data. To maintain consistency in data trends, we present estimates based on CPS data analyzed by TRIM3 beginning in 1993, the first year the TRIM3 microsi