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The SIPP was a longitudinal, multi-panel survey consisting of mostly adults in U.S. households. Data collection was intended to provide a better understanding on the effects of government programs as they relate to income distribution, wealth and poverty in order to improve the accuracy in reporting income, and evaluate the impact of the law. The data set included information on: economic well-being, family dynamics, education, assets, health insurance, childcare and food security. Participants were interviewed at least nine times in four month intervals and were followed over the life of the panel.