For this exercise, your instructor may assign you to a group. Can you think of a good or service that is produced entirely by one company without the purchase of any raw materials or other goods or services from another company? First, each member of the group should propose at least one company that might meet this criterion by writing it down on a piece of paper and not showing it to other group members. Second, after each group member has written down a response, the members should then reveal their responses, and the group should discuss whether each company does indeed produce a good or service without any raw materials or goods and services from another company. If you cannot think of many such companies, which concepts from this chapter do you think this conclusion might illustrate?