Market Effects of Changes in Demand or Changes in Supply The Price Adjustment Process
Increase in Demand Price S D D1 Quantity More people want a good (such as Play Station 2). Demand increases
Increase in Demand Price S D D1 Quantity Demand increases, product has become relatively more scarce and price rises
Decrease in Supply Price S1 S D Quantity Costs to supply the good have increased. Suppliers can supply less of the good. Supply decreases
Decrease in Supply Price S1 S D Quantity Supply decreases, product has become relatively more scarce and price rises
Decrease in Demand Price S D1 D Quantity Less people want a good (such as music tapes). Demand decreases
Decrease in Demand Price S D1 D Quantity Demand decreases, product has become relatively less scarce and price falls
Increase in Supply Price S S1 D Quantity Costs to supply the good have decreased. Suppliers can supply more of the good. Supply increases
Increase in Supply Price S S1 D Quantity Supply increases, product has become relatively less scarce and price falls