Backgrounds of moving to Rotterdam in 1986. R's former residence / household characteristics before and after moving to Rotterdam / type of accommodation before moving to Rotterdam / whether the present accommodation is owned or rented / moving in Rotterdam / reasons for moving to Rotterdam / how the present house or accommodation is obtained / whether respondent was registered at the City Housing Department of Rotterdam ( Dienst Woonruimtezaken Rotterdam ). Background variables: basic characteristics/ residence/ housing situation/ household characteristics/ occupation/employment/ education