DemandIn economics, demand is the quantity of a good that consumers are willing and able to purchase at various prices during a given time. The relationship between price and quantity demand is also called the demand curve. Demand for a specific item is a function of an item's perceived necessity, price, perceived quality, convenience, available alternatives, purchasers' disposable income and tastes, and many other options. Innumerable factors and circumstances affect a consumer's willingness or to buy a good.
Relations publiquesvignette|La Conférence de presse est l'un des moyens courants pour le relations publiques de communiquer avec la presse, pour informer le public ; ici, avec le président des États-Unis George W. Bush et le Premier ministre britannique Tony Blair à la Maison-Blanche.
