71.Thecommercialvalueofivoryisathreattotheelephant,butthecommercialvalueofbeefisaguardianofthecow.Thisisbecause a.thecowisraisedindevelopedcountries,whiletheelephantlivesprimarilyinless-developedcountries. b.cowsareprivategoods,whileelephantstendtoroamfreelywithoutowners. c.cowsandelephantsarepublicgoods,butivoryisnonrival. d.ivoryisnonrivalandnonexclusive,butbeefisrivalandexclusive. 72.Whyisthecommercialvalueofivoryathreattotheelephant,whilethecommercialvalueofbeefisthecow’sguardian? a.ElephantsliveinAfrica,whereascowsliveintheUnitedStates. b.Elephantsareacommonresource. c.Cowsareacommonresource. d.Cowsareapublicgood. 73.Whyhasthevalueofivorythreatenedtheextinctionoftheelephant,whereasthevalueofbeefhasenhancedthesurvivalofthecow? a.Cowsareacommonresource,whereaselephantsareownedbygovernments. b.Elephantsarelargerthancows,requiringmoreeconomicresources. c.ElephantsliveinAfrica,whereeconomicresourcesarescarce. d.Elephantsareacommonresource,whereascowsareprivatelyowned. 74.Manyspeciesofanimalsarecommonresources,andmanymustbeprotectedbylawtokeepthemfromextinction. a.Cowsreproduceatahighrateandhaveadaptedwelltotheirenvironment. b.Publicpoliciesprotectcowsfrompredatorsanddiseases. c.Cowsareprivatelyowned,whereasmanyendangeredspeciesareownedbynoone. d.Thereisanaturalecologicalbalancebetweenthebirthrateofcowsandhumanconsumption. 75.ElephantpopulationsinsomeAfricancountrieshavestartedtorisebecause a.environmentalistshavedevelopedeffectiveeducationalcampaigns. b.thevalueofivoryhasdecreased. c.someelephantshavebeenmadeaprivategood,andpeopleareallowedtokillelephantsontheirownproperty. d.regulationsarebeingenforcedmoreforcefully. 76.ItiscommonknowledgethatmanyU.S.nationalparkshavebecomeoverused.Onepossiblesolutiontothisproblemisto a.increaseentrancefees. b.decreasecampingpermitfees. c.requireallvisitorstoregisteruponenteringthepark. d.sellthelandthattheparkscurrentlyoccupy. 77.Onholidayweekendsthousandsofpeoplepicnicinstateparks.Somepicnicareasbecomesoovercrowdedthebenefitorvalueofpicnickingdiminishestozero.SupposethattheMinnesotaStateParkServiceinstitutesavariablefeestructure.Onweekdayswhenthepicnicareasgetlittleuse,thefeeiszero.Onnormalweekends,thefeeis$8perperson.Onholidayweekends,thefeeis$14perperson.Thefeesystemcorrectsaproblemknownasthe a.Coasetheorem. b.freeriderproblem. c.TragedyoftheCommons. d.publicgoodsproblem. 78.CongressmanSmithandCongresswomanJohnsonbothconsiderthemselvesadvocatesforthenationalparksandareintroducingdifferentbillsdesignedtobenefittheparks.CongressmanSmith’sbillcallsforanincreaseintheentrancefees.CongresswomanJohnson’sbillcallsforadecreaseintheentrancefees.Which of the bills would bemoreeffectiveatensuringthequalityofthenationalparks? a.CongressmanSmith’sbillbecauseitwillreducetheoveruseoftheparks b.CongresswomanJohnson’sbillbecausemorevisitorsmeansmorecitizenswillvalueandcarefortheparks c.Bothbillswouldbeequallyeffective. d.Neitherbillwouldbeeffective. 79.Ninefriendswholovethebeachdecidetopooltheirfinancialresourcesandequallysharethecostofaone-weekhouserentalonNantucket.Supposethatthebeachoutsideofthehousebecomesmorecongestedwhenthenineadditionalpeoplejointheotherbeachgoers.Whichofthefollowingstatementsisnotcorrect? a.Useofthebeachbytheninenewbeachgoerswillyieldanegativeexternality. b.Thetowncanreducethecongestionexternalitybyraisingthefeetoaccessthebeach. c.Anincreaseinthefeetoaccessthebeachcouldbeviewedasacorrectivetaxontheexternalityofcongestion. d.Eachoftheninefriendswouldhavebeenbetteroffstayingathome. 80.Tenfriendswholovetoskidecidetopooltheirfinancialresourcesandequallysharethecostofaone-weektime-sharecondominiuminAlta,Utah.Supposethattheliftlinesattheskiresortbecomemorecongestedwhenthetenadditionalpeoplestarttoski.Whichofthefollowingstatementsisnotcorrect? a.Useoftheskiresortbythetennewskierswillyieldanegativeexternality. b.Theskiresortcanreducethecongestionexternalitybyraisingliftticketprices. c.Anincreaseinliftticketpricescouldbeviewedasacorrectivetaxontheexternalityofcongestion. d.Eachofthetenfriendswouldhavebeenbetteroffstayingathome.