Editing Demand curve (section)

===Factors affecting individual demand===
* Changes in the prices of related goods (substitutes and complements)
* Changes in [[Disposable/Discretionary income|disposable income]], the magnitude of the shift also being related to the [[income elasticity of demand]].
* Changes in tastes and preferences. Tastes and preferences are assumed to be fixed in the [[short-run]]. This assumption of fixed preferences is a necessary condition for aggregation of individual demand curves to derive market demand.
* Changes in expectations.<ref name="krugman et al."/>{{rp|61–62}}