Social differentiation and reading behaviour. Reading (and frequency of reading) national, local and regional newspapers, weekly's and magazines, also by parents and partner / being subscribed to newspapers, weekly's and magazines / reading books in leisure time / number of books read during last two months / (frequency) of reading different types of novels and poetry / time spent at reading books, watching tv, work and domestic activities at the age of 18, at the age of 35 and at present / (frequency of) reading about specific subjects in newspapers / being subscribed to a portfolio with magazines / reading light reading matters or literature or both / having a favourite author, a favourite book or type of book / preferred type of book / reading behaviour / lending and-or buying books / membership of public library / money spent at books, newspapers, magazines / time spent at reading / reading behaviour when respondent was a child / influence of parents on reading behaviour / reading behaviour of brothers and sisters / reading behaviour of parents during his-her childhood (10-12 years old) / book collection of parents / cultural interest of parents during his-her childhood (10-12 years old) / having a tv at home when respondent was between 10 and 12 years old and frequency of watching tv at that time / respondents reading history / respondents knowledge about literature / other leisure activities / sharing interest in literature with partner and-or friends / test of respondent's general knowledge / influence of school on reading / reading behaviour of partner and friends. Background variables: basic characteristics/ household characteristics/ occupation/employment/ income/capital assets/ education/ politics/ religion/ readership, mass media, and 'cultural' exposure