The kit aims to provide the information necessary to develop and improve statistical systems for migration statistics with regard to the quality, coverage, collection and use of migration data. Where possible, it identifies some of the common pitfalls to avoid in this field and provides, in the annex, model tables developed by the United Nations for the collection of comparable migration data. It also aims to encourage the use of hitherto under-exploited administrative sources of migration data, in addition to censuses and surveys.