tendance (1) voyage (1) enquête (1) mode de vie (1) revenu (1) ménage (1) science économique (1) âge (1) automobile (1) socio-économie (1) Development (1) Travel (1) Surveys (1) Electronic commerce (1) Economics--Sociological aspects (1) Voyages and travels (1) Variations (1) Travel (1) Surveys (1) Optimism (1) Migration, Internal (1) Manufacturers' agents (1) Income (1) Home ownership (1) Evidence (1) Ethnicity (1) Economics (1) Commission merchants (1) Automobiles (1) Age (1)