no explicit plans to use records other than the U.S. Postal Service Delivery Sequence File for updating the Master Address File. We are skeptical for a number of reasons about the feasibility of using administrative records to augment the integrated coverage measurement household rosters and to impute missing long-form items. We are intrigued, however, by the prospective use of administrative records as a component of the estimation methodology for census nonrespondents who are not selected for nonresponse follow-up. To support this and possible other uses of administrative records, we recommend (above) continuing research on the development of strategies for pooling multiple administrative records files to enhance their coverage and the quality of the data they contain and a number of specific research tasks that will assist this effort.