Theory Of Demand, Types Of Demand Law Of Demand And Elasticity And Its Types South City International School Class 10 Research Pape

2547 words - 11 pages

INTRODUCTION
Demand in economics is how many goods and services are bought at various prices during a certain period of time. Demand is the consumer's?need or desire to own the product or experience the service. It's constrained by the willingness and ability of the consumer to pay for the good or service at the price offered.
Demand is the underlying force that drives everything in the economy. Fortunately for economics, people are never satisfied.
They always want more. This drives?economic growth?and expansion. Without demand, no business would ever bother producing anything.
Factors Effecting Demand (Determinants)
Price.?The?law of demand?states that when prices rise, the quantity of demand falls. That also means that when prices drop, demand will grow. People base their purchasing decisions on price if all other things are equal.
The exact quantity bought for each price level is described in the?demand schedule. It's then plotted on a graph?to show the?demand curve.?
If the quantity demanded responds a lot to price, then it's known as?elastic demand. If the volume doesn't change much, regardless of price, that's?inelastic demand.
The demand curve only shows the relationship between the price and quantity. If one of the other determinants changes, the entire?demand curve shifts.
Income.?When income rises, so will the quantity demanded. When income falls, so will demand. But if your income doubles, you won't always buy twice as much of a particular good or service. There's only so many pints of ice cream you'd want to eat, no matter how rich you are. That's where the concept of?marginal utility?comes into the picture. The first pint of ice cream tastes delicious. You might have another. But after that, the marginal utility starts to decrease to the point where you don't want any more.
Prices of related goods or services.?The price of complementary goods or services raises the cost of using the product you demand, so you'll want less. For example, when?gas prices rose to $4 a gallon in 2008, the demand for Hummers fell.
Gas is a complementary good to Hummers. The cost of driving a Hummer rose along with?gas prices.
The opposite reaction occurs when the price of a substitute rises. When that happens, people will want more of the good or service and less of its substitute. That's why Apple continually innovates with its iPhones and iPods. As soon as a substitute, such as a new Android phone, appears at a lower price, Apple comes out with a better product. Then the Android is no longer a?substitute.
Tastes.?When the public?s desires, emotions or preferences change in favor of a product, so does the quantity demanded. Likewise, when tastes go against it, that depresses the amount demanded. Brand advertising tries to increase the desire for consumer goods. For example, Buick?spent?millions to make you think its cars are not only for older people.
Expectations.?When people expect that the value of something will rise, then they demand more of it....

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