Demand
In 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.[O'Sullivan, A; Sheffrin, S. p. 79]
According to C. R. McConnell and S. L. Brew, demand can be represented in
the form of a scale or curve showing the quantity of a product that consumers
are willing and able to buy at each particular price out of a range of possible
over some time. The demand will reflect some alternatives, which can be
presented as a table or graph showing the quantity of the product demanded at
different prices, ceteris paribus. [McConnell, K., Bru, S. p. 61-67]
O'Sullivan, A; Sheffrin, S. (2003). Economics: Principles in Action. New Jersey: Pearson Prentice Hall.
McConnell, K., Bru, S. (1992). Economics: Principles, Problems, and Policies. Moscow: Republic.