Jim Whitney Economics 101
Market equilibrium worksheet
 
    1. In the diagram below, plot the following hypothetical supply and demand information for personal computers (PCs):


     Quantity           Quantity
     Demanded   Price   Supplied
    (millions)   ($)   (millions)
       2       $3,000     17
       4        2,500     16
       7        2,000     14
      11        1,500     11
      16        1,000      7
      22          500      2

    2. The equilibrium price "clears the market," in that quantity demanded equals quantity supplied. The equilibrium price = _________.

    3. At a price of $2,500...
        Is there excess demand or excess supply? __________________
        How many units? _________ million
        Are PC inventories rising or falling? __________________
        Is the incentive to raise or lower price? __________________

    4. At a price of $1,000...
        Is there excess demand or excess supply? __________________
        How many units?_________ million
        Are PC inventories rising or falling? __________________
        Is the incentive to raise or lower price? __________________

    5. Indicate whether equilibrium price (P) and quantity (Q) will rise (+) or fall (-) if:
                            Price  Quantity
    (1) Supply shifts right _____   _____
    (2) Supply shifts left  _____   _____
    (3) Demand shifts right _____   _____
    (4) Demand shifts left  _____   _____