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【单选题】
All of the following statements about sticky prices are true except:A.
in the short run, some wages and prices are sticky.
B.
the sticky-price model describes the equilibrium toward which the economy slowly gravitates.
C.
for studying year-to-year fluctuations, most macroeconomists believe that price stickiness is a better assumption than is price flexibility.
D.
magazine publishers tend to change their newsstand prices only every three or four years.
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