Below are nine concepts, 1-9, and nine definitions, A-I. Match each definition to its concept by writing the correct letter in the blanks. ---- 1. Nonexcludable 2. Nonrival ---- 3. Private good ---- 4. Public good 5. Free rider ---- 6. Forced rider 7. Club good ---- 8. Common resources 9. Tragedy of the commons A Goods that are nonexcludable but rival B Someone who enjoys the benefits of a public good without paying a share of the costs C The tendency of any resource that is unowned and hence nonexcludable to be overused and undermaintained D A good that is excludable but nonrival E Someone who pays a share of the costs of a public good but who does not enjoy the benefits F A good that is excludable and rival G A good that is nonexcludable and nonrival H A good exhibits this characteristic if people who don't pay cannot be easily prevented from using the good I A good exhibits this characteristic if one person's use of the good does not reduce the ability of another person to use the same good