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1、原文:Taxes,TradableRightsandTransactionCostsWithrespecttomarket-basedpolicyapproaches,itisawidelyheldviewthatcorrectivetaxationentailssubstantial.Thisconclusiononlyholdsifset-upcostsaresingledout.Itisarguedthattheprevalenceoftransactioncostsislargelydep
2、endentonthedesignofthepolicyinstrument,respectivelythetaxbaseorthetradingregimechosen.Comparativeanalysisfurthershowsthatacap-and-tradeprogramofemissionpermitsdistributedforfree,tradedonabrokeredmarketandmonitoredupstreamisnotonlymoreeffective,butalso
3、likelytoentailfewertransactioncoststhanenvironmentaltaxes.Anyattempt,inturn,tosavethehugeinformation,enforcementandcompliancecostsincurredbycorrectivetaxationimpairsitsefficacybyseveringthelinkbetweentheenvironmentalexternalityandthetaxbase.Basically,
4、thereexistfourpolicyinstrumentstocurbpollution:directregulation,environmentalliability,ecologicaltaxesandtradableemissionrights.Thelattertwoaresimilarinthesensethattheyaremarket-basedinstrumentsthatusethepricesystemtointernalizeenvironmentaldamages.Th
5、eycomparefavorablytothetwoformerapproachesbecausetheyareflexibleandcost-effectiveasformallydemonstrated.Despitetheirsimilarity,mostcountriesrelyontaxesinsteadoftradablepermits.SincetheKyotoProtocol,however,thereisarenewedpoliticalandscientificinterest
6、intradableemissionrights.Withthisriseinpublicinterest,theallegedcomplexityofthesystemandsubsequenttransactioncostsareunremittinglycriticized.Inthisarticle,wewillassessthemeritsofthiscriticism.Taxestypicallycarrybothanincentiveandfinancialeffect.Althou
7、ghthepurposeofPigouviantaxationistobringaboutachangeinactivityandpollutionlevels,environmentaltaxescanbeeasilyconceivedasjustanalternativesourceofrevenueforthegovernment.Assumingalowtreasurypreference,publicsupportmayhavetobewonbyanenvironmentaltaxref
8、ormthatbalancesenvironmentaltaxrevenueswithtaxcutselsewhereorprovidestaxincentivesforpollutionreduction.However,thisdoesnotsolvethesystemicinformationproblem.Whenenvironmentaltaxesaresettoolow,suboptimalemissionreductionswillresult.Alternative