Commentary: Survey research in Social Security.

Though some data needs can be met using program information collected as part of the claims process, these data are not sufficient to prwide a comprehensive picture of the degree to which Social Security contributes to the economic security of the beneficiary population. Additional information-such as other income sources, amount of total income, assets, work experience, and health-is essential to any analysis of their economic wellbeing. This type of information is best obtained in personal interviews. The need for survey data was recognized very early in the program’s history. The first retirement benefits were paid under the Old-Age and Survivors