Microeconomics
Instructions:
Problem 1
The demand and supply functions for hockey sticks are represented by the following
equations, where Qd is the number of crates of sticks demanded, Qs is the number of crates
of sticks supplied and P is the price per stick in dollars:
Qd = 286 – 2P
Qs = 88 + 4P
a) Plot the supply and demand curves for hockey sticks.
b) Calculate the equilibrium price and quantity in the market for hockey sticks.
c) A major industry advertising campaign increases the demand for hockey sticks to
the new equation Qd = 328 – 2P; plot the new demand curve together with the
original demand curve and the original supply curve and calculate the new
equilibrium price and quantity; by how much has the revenue to suppliers changed?
d) Returning to the original demand and supply curves, if there was a shortage of
wood, causing a shift in the industry supply curve, how would equilibrium price
and quantity change?
e) Returning to the original demand and supply curves, if there was a recession
causing a contraction in consumer incomes, but not affecting suppliers, how would
the curves shift and how would equilibrium price and quantity change?
