“…Among the latter, respondents were asked to provide basic information on type of dwelling, number of rooms, and tenure; availability of amenities such as fixed bath or shower, garden, and separate kitchen; household attributes such as space and density of living; and possession of nine appliances and accessories: television, washing machine, telephone, refrigerator, deep freeze, central heating, a car, a garage and a second home (Davis and Fine-Davis 1991). The SPES Social Indicators System (for the German Federal Republic), which enables simple time-series analyses, paid attention to housing characteristics, including ownership, space, and presence of equipment such as a bath and central heating (Zapf 1980).…”