SHIFTS IN THE
IS
CURVE
Five factors cause the
IS
curve to shift: changes in
autonomous consumer spending, changes in investment spending related to busi-
ness confidence, changes in government spending, changes in taxes, and
autonomous changes in net exports. How changes in these factors lead to a shift in
the aggregate demand curve is examined in Figure 23-12.
F I G U R E 2 3 - 11
Deriving the Aggregate Demand Curve
The
ISLM
diagram in panel (a) shows that as the price level rises from
P
1
to
P
2
to
P
3
, the
LM
curve shifts to the left, and equilibrium output falls. The combinations of the price level and
equilibrium output from panel (a) are then plotted in panel (b), and the line connecting them is
the aggregate demand curve
AD.
Interest
Rate,
i
i
1
i
2
Y
1
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