puits (2) étable (2) risque (2) recherche (2) pénalité (2) association (2) papier (2) séparation des masses (physique) (2) revenu (2) emploi (2) effet (2) dissolution (2) Divorce (2) Dissolution (2) Employment (2) Couples (2) Birth (2) Women (2) Unmarried couples (2) Social norms (2) Social groups (2) Scholars (2) Risk (2) Research (2) Population (2) Parturition (2) Paper (2) Measurement (2) Labor (Obstetrics) (2) Income (2)