WAEC - Economics (2012 - No. 3)

A shift in the demand curve means that other determinants of demand other than price causes demand to change. They include changes in tastes, population, income, prices of substitute or complementary goods, and expectations about future conditions and prices. This is usually an indication of a change in demand.

A change in demand describes a shift in consumer desire to purchase a particular good or service, irrespective of the price difference.