Studies of Welfare Populations: Data Collection and Research Issues. Endnotes

06/01/2002

1.  Note that although statistical and economic theories provide the foundation for analysis of error-prone data, these disciplines provide little theoretical foundation for understanding the source of the measurement error nor the means for reducing measurement error. The discussion presented here will be limited to a review of cognitive and social psychological theories applicable to the measures of interest in understanding the welfare population.

2.  An alternative interpretation of the findings might suggest that the decomposition approach was more accurate and that the apparent overestimation, when compared to administrative records, is because of underreporting of income in the administrative records rather than overreporting of earnings using the decomposition method.

3.  Based on the Panel Study of Income Dynamics validation study, a survey conducted among a sample of employees at a single establishment and comparing their responses to those obtained from company records. The data from the first wave of this two-wave study were the basis for the study reported by Duncan and Hill (1985).

4  The CPS is collected each month from a probability sample of approximately 50,000 households; interviews are conducted during the week containing the 19th day of the month: respondents are questioned about labor force status for the previous week, Sunday through Saturday, which includes the 12th of the month. In this way, the data are considered the respondent's current employment status, with a fixed reference period for all respondents, regardless of which day of the week they are interviewed. In addition to the core set of questions concerning labor force participation and demographic characteristics, respondents interviewed in March of any year are asked a supplemental set of questions (hence the name March supplement) concerning income recipiency and amounts, weeks employed, unemployed and not in the labor force, and health insurance coverage for the previous calendar year.

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