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(product development definition)
that are manufactured together, sold together, bought together, or used together. One aids or enhances the other.
Those products whose demands are positively related, i.e., an increase in quantity demanded by the market of Product A results in an increase in the quantity demanded for Product B.
A product that is used or sold jointly with other products, such as razors and blades, or shampoo and conditioner.
American Marketing Association.
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