In: Economics
a) The income of consumers falls (wine is a normal good).
b) Weather problems destroy part of the grape crop for making wine.
c) A new invention reduces the cost of producing cheese.
d) A new fermentation technique is invented that reduces the cost of producing wine.
e) The cost of producing both wine and beer increase dramatically.
NOTE: In all cases explained below, the Okanagan wine market is initially at equilibrium point A (the point at which the supply curve S and demand curve D intersect), with intial equilibrium price P0 and equilibrium quantity Q0.