Demand Concept of Demand Demand is defined as the effective desire for a good or service backed by ability and willingness to pay. It is also defined as the quantity of a good or service which a consumer would buy in a market at a given price and time period. Demand Function The demand for a particular commodity is influenced by so many factors-they together are known as determinants of demand in technical jargon. A demand function in mathematical term expresses functional relationship between the demand for a product and its various determining factors. For instance, Qdx = f(Px, Py, Y, Adv, T&P, F, Cl, Pop, Gp, Exp., Dist. ......) Types of Demand Function 1. Short Run Demand Function: Qdx = f(Px) ...........OTRS 2. Long Run Demand Function: Qdx = f(Px, Py, Y, Adv, T&P, F, Cl, Pop, Gp, Exp., Dist., ......) 3. Linear Demand Function: The slope of the demand curve remains constant throughout its length is known as LDF. In other words, if both independent...