revenu (3) Methods (3) Manufacturers' agents (3) Income (3) Commission merchants (3) Older people (3) Methods (3) puits (2) enquête (2) prime (2) association (2) modèle (2) travail (2) santé (2) Union européenne (2) déplacement journalier domicile-travail (2) main-d'oeuvre (2) index (2) Selection (2) Observations (2) Observations (2) Employees (2) Social groups (2) Population (2) Migration, Internal (2) Leisure (2) Hypothesis (2) Health (2) Frontier workers (2) French (2)