Preface

the Survey of Inconv and Program Participation, " and should provida a 8enera1 introduction to the survey. It incorporates information on several changes that were made in the SIPP program after the original paper was issued in June 1984. Ue ass- that other SIPP program changer will occur after this paper is released and hope to issue additional "Updates " as frequently as necessary to describe the current status of SIPP. Uorking Paper lo. 8401 was written mainly by Dawn lelson, David Hcllfllen, and Daniel Kasprzyk. The revisions to this paper, which resulted in Update 1, were mode by Dawn Nelson. Wuwrous other Census Bureau staff members and SIP