ECSENOMICS A Decline in Aggregate Demand t Leads to an Economic Downturn 1-170 Figure 23-4 P AS AD AD 3 B A AD Potential output Q Q Real output McGraw-Hilllrwin Copyright C 2001 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. A Decline in Aggregate Demand Leads to an Economic Downturn T-170 Figure 23-4