train (1) temps (durée) (1) enquête (1) statistiques (1) lumière (1) information (1) effet (1) science économique (1) demande (offre et demande) (1) décision (1) âge (1) point (1) entreprise (1) Purchasing (1) Statistics (1) Tickets (1) Rich people (1) Voyages and travels (1) Travelers (1) Time (1) Swiss (1) Statistics (1) Railroads (1) Purchasing (1) Percentage (1) Machine learning (1) Light (1) Leisure (1) Impact (1) Forecasting (1)