<P> A number of business publications have published opinion pieces on the actions that raise demand . </P> <P> Market or aggregate demand is the summation of individual demand curves . In addition to the factors which can affect individual demand there are three factors that can affect market demand (cause the market demand curve to shift): </P> <Ul> <Li> a change in the number of consumers, </Li> <Li> a change in the distribution of tastes among consumers, </Li> <Li> a change in the distribution of income among consumers with different tastes . </Li> </Ul> <Li> a change in the number of consumers, </Li>

The market-demand curve is referred to as a change in