Question

question 14 (1 point)
what is the practice of tying used to do?
control the retail price of a collection of related products
package products to sell at a combined price closer to a buyers total willingness to pay
enhance the enforcement of antitrust laws
encourage the enforcement of collusive agreements

Explanation:

Tying is a business practice where a seller requires a buyer to purchase one product (the tying product) as a condition for purchasing another product (the tied product). The goal is often to package products. When products are tied, the combined price can be set closer to a buyer's total willingness - to - pay. This can increase the seller's revenue. For example, if a consumer is willing to pay $A$ for product $X$ and $B$ for product $Y$, and the sum $A + B$ is higher than the sum of the individual prices when sold separately (in a non - tied situation), tying can capture more of the consumer's surplus.
Controlling retail prices of related products is more about price - fixing agreements among sellers rather than tying. Tying is not related to enhancing antitrust law enforcement (in fact, it can sometimes be a violation of antitrust laws in certain contexts). And it has no relation to encouraging collusive agreements (collusive agreements are about firms agreeing to restrict output or fix prices among themselves, which is different from tying).

Answer:

Package products to sell at a combined price closer to a buyer's total willingness to pay.