The purpose of this project was to test whether an alternative procedure to roster the household would reduce undercoverage on the Survey of Income and Program Participation (SIPP). The current procedure, which is identical to that used on most other household surveys, administers questions to a household respondent which require him/her to list members of the unit who "live or stay there." This approach has been criticized because terms such as "live" or "stay here" are ambiguous when applied to individuals who are either not legally attached to any particular household member or who actually reside in more than one unit.