Double take: Oliver and James as the Weasley twins in the 2003 film Harry Potter And The Prisoner Of Azkaban surrounded by their co-stars. Identical: James, left, and Oliver Phelps arrive at London's Odeon Leicester Square for the world premiere of 'Harry Potter and the Chamber of Secrets' in 2002.
An increase in demand is represented by a shift of the demand curve to the right: A decrease in from ECON 101 at Universitat Pompeu Fabra
An increase in government purchases shifts the aggregate demand curve to the left. A decrease in government purchases shifts the aggregate demand curve to the right. The shift in the aggregate demand curve is not exactly the amount of the government purchase though.hanges in Taxes. The two instruments of fiscal policy are government spending and taxation. A tax increase depresses consumer spending and shifts the aggregate demand curve to the left. A tax cut shifts the aggregate demand curve to the right.