Final answer:
The concept of value, as defined by Clay Carr in the book Front-Line Customer Service, refers to the benefit a customer receives minus the cost they must pay. Customers are attracted and retained by superior value.
Step-by-step explanation:
The concept of "value" as defined by author Clay Carr in the book Front-Line Customer Service refers to the benefit that a customer receives minus the cost that the customer must pay. This means that customers are attracted and retained by superior value. In other words, when the benefit a customer receives from a product or service is greater than the cost they have to pay, they are more likely to be attracted to and remain loyal to that business.