Streets and households in this neighborhood were selected at random. For
instance, the pilot project started with the selection of every 10th household
in four randomly chosen streets. We invited these households to participate
in the documentation project, which was introduced in the local newspaper
and advertised in free copies of the neighborhood press. The interviews concentrated
on 11 topics. Apart from vital facts (name, address, number of
family residents), several questions about migration history and living conditions
were listed. We analyzed household data and compared with the