This is about a survey in which large amounts of information about the economic situation of households (and the people in them) are requested from respondents. The Survey of Income and Program Participation (SIPP) is a large national household-based longitudinal survey. Households are in sample for a total of 32 months and are visited by an interviewer every four months (for a total of 8 interviews). During each interview, respondents are asked questions about their employment, economic situation and program participation during the preceding four months. A large part of the intent of the survey is to be able to examine the economic and social changes that occur to people over time. As such accurate information in each interview is especially critical, since the independent interviews will eventually comprise one complete 32-month data file. During interviews we strongly encourage respondents to use records of some kind when telling us about their jobs, the programs that belong to, the sources of incomes they have, or the amount of money each of those sources provides. Interviewers are trained to probe for this information, but not to jeaporadize the interview if the respondent does not seem willing of interested in using records. In these cases, interviewers are instructed to take whatever information they can obtain.