temps (durée) (2) spectacle (2) prix (2) papier (2) modèle (2) marché (2) analyse (2) demande (offre et demande) (2) consommation (2) Year (2) Time (2) Social sciences (2) Shipping (2) Retail trade (2) Prices (2) Pricing (2) Paper (2) Markets (2) French (2) Exercise (2) Example (2) Equations (2) Elasticity (Economics) (2) Competition, Imperfect (2) Prices (2) Analysis (2) Exercise (2) légume (1) surplus (1) lumière (1)