出版社：Food and Agriculture Organization of the United Nations
摘要：Whatever improvement higher
product prices might have
made to the incomes of
producers, increases in input costs have
worked against it or even cancelled it out.
Input costs have been increasing steadily
for some years and many farmers saw
rising output prices as a temporary respite
from diminishing margins over costs until
input prices shot up dramatically in 2007,
outpacing output prices.
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