enquête (1) stratification (1) sociologie (1) recherche (1) littérature (1) intérêts (1) famille (1) environnement (1) éducation (1) décomposition (1) Education (1) Registers (1) Social stratification (1) States (1) Twins (1) Sociology (1) Social institutions (1) Social history (1) Scandinavia (1) Research (1) Registers (1) Political science (1) Perspective (1) Parents (1) Nature and nurture (1) Must (1) Literature (1) Interest (1) Impact (1) Families (1)