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Nature of
Demand
Learning Objectives:
 Understand   key economic terms related to
  demand
 Learn to create/interpret demand schedules
  and demand curves
Demand
 The  amount of a good
 that consumers are
 willing and able to buy at
 a given point in time.
 Price
     is the main variable affecting
 demand, so…

Law of Demand:
 Increase in good’s price cause a decrease in
 quantity demanded. Decrease in price causes
 increase in quantity demanded.


             Price =    Demand

             Price =    Demand
Income Effect
 Purchasing    power:
    amount of
     goods/services one can
     buy with a set amount of
     $$


 Income   effort:
    Change in purchasing
     power due to change in
     price
Substitution Effect
   Consumers   tend to choose the lower-priced
   product if similar
 Marginal
           Additional/more
     Utility
           Amount of satisfaction you get from consuming
            a product

Diminishing Marginal Utility
  As more units are consumed, the
   satisfaction you get from each
   additional one decreases
  *demand has a limit!
New item*




            Market price:$4,500
When will you buy the TV?
Date of            Price per TV
Purchase           (in dollars)
Today              $4,500
April 2013         $3,500
Half-yearly sale   $3,000
4th of July sale   $2,000
Labor Day sale     $1,500
Black Friday       $900

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Nature of demand

  • 2. Learning Objectives:  Understand key economic terms related to demand  Learn to create/interpret demand schedules and demand curves
  • 3. Demand  The amount of a good that consumers are willing and able to buy at a given point in time.
  • 4.  Price is the main variable affecting demand, so… Law of Demand:  Increase in good’s price cause a decrease in quantity demanded. Decrease in price causes increase in quantity demanded. Price = Demand Price = Demand
  • 5. Income Effect  Purchasing power:  amount of goods/services one can buy with a set amount of $$  Income effort:  Change in purchasing power due to change in price
  • 6. Substitution Effect  Consumers tend to choose the lower-priced product if similar
  • 7.  Marginal  Additional/more  Utility  Amount of satisfaction you get from consuming a product Diminishing Marginal Utility  As more units are consumed, the satisfaction you get from each additional one decreases  *demand has a limit!
  • 8.
  • 9. New item* Market price:$4,500
  • 10. When will you buy the TV? Date of Price per TV Purchase (in dollars) Today $4,500 April 2013 $3,500 Half-yearly sale $3,000 4th of July sale $2,000 Labor Day sale $1,500 Black Friday $900