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Demand curve
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==Movement along a demand curve== There is movement ''along'' a demand curve (edogenous changes) when a change in price causes the quantity demanded to change.<ref name="Case, K.E. 1994" /> It is important to distinguish between movement along a demand curve, and a shift in a demand curve. Movements along a demand curve happen only when the price of the good changes.<ref name="Underwood 2001">Underwood, Instructor's Manual, Microeconomics 5th ed. (Prentice-Hall 2001) at 5.</ref> When a non-price determinant of demand changes, the curve shifts. These "'''other variables'''" are part of the demand function. They are "'''merely lumped into intercept term of a simple linear demand function'''."<ref name="Underwood 2001"/> Thus a change in a non-price determinant of demand is reflected in a change in the x-intercept causing the curve to shift along the x axis.<ref name="autogenerated1">The x intercept is affected because the standard diagram uses the inverse demand function</ref>
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