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【单选题】
If firms are positive economic profits in the short run, then in the long run:
A.
the short-run industry supply curve will shift leftward.
B.
firms will enter the industry.
C.
industry output will rise and the price will rise.
D.
firms will leave the industry.
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举一反三
【单选题】If aggregate demand decreases and neither short-run nor long-run aggregate supply changes, then
A.
the price level increases in the short-run and decreases in the long-run.
B.
there is an inflationary gap.
C.
there is a recessionary gap.
D.
in the long run, the long-run aggregate supply will decrease.
【单选题】In the short run, the Fed's actions to fight inflation shift the
A.
aggregate demand curve rightward.
B.
aggregate demand curve leftward.
C.
short-run aggregate supply curve rightward.
D.
short-run aggregate supply curve leftward.
【单选题】If a good has a perfectly inelastic short-run supply curve, an increase in demand will:
A.
increase the price and quantity exchanged in the short run.
B.
increase the price and but leave the quantity exchanged the same in the short run.
C.
increase the quantity exchanged but leave the price the same in the short run.
D.
leave both price and quantity exchanged the same in the short run.
【单选题】The short-run Phillips curve shows the relationship between
A.
the price level and real GDP in the short run.
B.
the price level and unemployment in the short run.
C.
inflation and unemployment when expected inflation equals the actual inflation.
D.
inflation and unemployment when expected inflation does not change.
相关题目：
【单选题】If aggregate demand decreases and neither short-run nor long-run aggregate supply changes, then
A.
the price level increases in the short-run and decreases in the long-run.
B.
there is an inflationary gap.
C.
there is a recessionary gap.
D.
in the long run, the long-run aggregate supply will decrease.
【单选题】In the short run, the Fed's actions to fight inflation shift the
A.
aggregate demand curve rightward.
B.
aggregate demand curve leftward.
C.
short-run aggregate supply curve rightward.
D.
short-run aggregate supply curve leftward.
【单选题】If a good has a perfectly inelastic short-run supply curve, an increase in demand will:
A.
increase the price and quantity exchanged in the short run.
B.
increase the price and but leave the quantity exchanged the same in the short run.
C.
increase the quantity exchanged but leave the price the same in the short run.
D.
leave both price and quantity exchanged the same in the short run.
【单选题】The short-run Phillips curve shows the relationship between
A.
the price level and real GDP in the short run.
B.
the price level and unemployment in the short run.
C.
inflation and unemployment when expected inflation equals the actual inflation.
D.
inflation and unemployment when expected inflation does not change.
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