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Explore the concept of demand in economics, including the factors that influence it and how changes in price and income affect consumer choices. Learn about substitutes, complements, income, consumer tastes, expectations, market size, and elasticity of demand.
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What is Market Research? http://www.google.com/insights/consumersurveys/home#
What is the role of PRICE in the economy? • A neutral source on information • Allows for change in the economy • It allows freedom of choice
Demand • Demand is the desire to have some good or service and the ability to pay for it. • The law of demand states that when the PRICE of a good or service GOES DOWN, consumers buy MORE, meaning demand increases. • If price goes UP, demand should DECREASE. The Big Bang Theory 5x05 - The Sword - YouTube
Demand Curve Price A 30 B 25 DEMAND CURVE C 20 D 15 E 10 F 5 0 1 4 5 2 3 Quantity
Demand Changes • Change in quantity demanded is a change in PRICE or QUANTIY. This will cause you to move along the curve, up/down. We call these “MOVERS”
Change in Quantity Demand A B Price C D Moves along the curve E F Quantity
Demand Changes • Change in demand meanwhile is a change in the AMOUNT YOU BUY. This means the curve will shift to the left or to the right. We call these “SHIFTERS”
Change in Demand A A B B Price C C D D Shifts left or right E E F F Quantity
Substitutes • Substitutes are goods/services that can be used in place of another good or service. • If the price of a substitute changes, people may be more/less inclined to get the original item. • Example • Pepsi or Coca Cola
Substitute’s price goes up Substitute’s price goes down
Complements • Complements are goods that are used together, so that a rise in demand in one good will increase the demand for the other good. • Example: hammer & nails
Complement’s price goes up Complement’s price goes down
Income • People’s ability to buy certain goods is affected by their income. • If their income changes, then their ability to buy certain goods will change.
Economic Growth: Higher Incomes Recession hits: Lower Incomes
Consumer Tastes • People’s tastes are constantly changing! • Advertising influences people’s tastes. http://www.youtube.com/watch?v=R55e-uHQna0
Terms • Normal Goods – goods consumers demand more of when their income rises. • Inferior Goods – goods that consumers demand more of when their income falls.
Recession hits: Generic brand goods Economic Growth: Generic brand goods
Consumer Expectations • If you expect a good to go on sale next month, you will WAIT to buy that product • Examples • Cars • Gas • Tickle-Me-Elmo
Consumers expect price to rise Consumers expect price to fall
Market Size • The size of the market is based on the number of consumers. • If people leave a region, the market size will decrease meaning the curve will shift to the left and vice versa. • Example • People leaving Buffalo has caused a smaller market size. • More people moving to Florida and Texas has created larger market sizes in these states.
Bigger Population Smaller Population
Elasticity of Demand • Elasticity of demand is how responsive consumers are to price changes. • Elastic demand – quantity demanded will change greatly as price changes.
Elastic Demand Price When demand is elastic, prices will not change much, but quantity demanded will change. 30 25 DEMAND CURVE A 20 B C 15 D E F 10 5 0 1 4 5 2 3 Quantity
Elasticity of Demand • Inelastic demand – quantity demanded will change little as price changes.
Inelastic Demand Price A When demand is in elastic, prices will change a lot, but quantity demanded will not change much. 30 B 25 DEMAND CURVE C 20 D 15 E 10 F 5 0 10 40 50 20 30 Quantity
Are there good substitutes? Yes = elastic No = inelastic What proportion of income does it use? Large = elastic Small = inelastic Is it a necessity or a luxury? Luxury = elastic Necessity = inelastic Factors that Determine Elasticity