Of course, two general changes in demand are possible, increase or decrease. However, there are many factors that can bring about these changes. The table below is a quick review of some possible causes of a change in demand.
Demand Increase Demand Decrease
Income Increase-Normal Good Income Decrease-Normal Good
Income Decrease-Inferior Good Income Increase-Inferior Good
Price Increase for Substitute Price Decrease for Substitute
Price Decrease for Complement Price Increase for Complement
Expect Future Price Increase Expect Future Price Decrease
Becomes More Fashionable Becomes Less Fashionable

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