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Economist Robert Barro attributes the increase in the duration of unemployment to ______, while economist Paul Krugman attributes the increased duration to _____.
A.
increased immigration of low-wage workers; tax cuts given to high-wage workers
B.
contractionary monetary policy; expansionary fiscal policy
C.
high marginal tax rates on the wealthy; high marginal tax rates on low-wage workers
D.
expanded unemployment-insurance coverage; insufficient consumer demand