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goods that are used with another good; an increase in the price of one product will result in a decrease in the demand for the complementary product.
products that are so similar that they can be bought or used instead of the original good.
a plastic card with encoded information that allows the holder to make purchases and to pay the...
when countries work together in the economic sphere to achieve mutual objectives; such as...
those factors which cannot be measured such as reliability and good service.