Jake is an excellent barber. however, all customers who come to him for a haircut must buy a bottle of shampoo. this type of arrangement is known as a tie-in sale.
When a business makes a conditional offer to sell a good or service only if the consumer also buys another good or service, this is known as tied selling, which is illegal.
The Federal Trade Commission (FTC) and the U.S. Department of Justice both deal with "tied-in" selling and "linked" items in the United States (DOJ).
By requiring purchasers to additionally purchase a second ("tied") good, this may restrict consumer choice for those looking to buy just one ("tying") product.
Usually, the "tied" product is a less desirable one that the customer would rather acquire from another vendor or would not purchase until forced to.
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