This report presents the findings of research conducted to investigate the effects of nonsampling errors in analyzing data related to participation in various government transfer programs obtained in the Survey of Income and Program Participation (SIPP). The research was conducted under a Joint Statistical Agreement between the U.S. Bureau of the Census and the Survey Research Center at the University of Michigan. The Joint Statistical Agreement (JSA-90-36), which was entitled “Some Nonsampling Error Considerations in Analyzing Program Participation in the SIPP”, ran from September 1990 until February 1992.