案例分析：粉红鲑市场.ppt

TheMarketforpinksalmonhasastandardizedproduct,forwhichpricehassubstantiallydeclinedinrecentyears.,CaseStudy:PinkSalmon,InitialEquilibrium,Twodecadesago,fishersearnedarelativelyhighpriceforeachpoundofpinksalmon.ThatpriceisrepresentedasP1,attheintersectionofsupplycurveS1anddemandcurveD1.ThecorrespondingquantityofpinksalmonisrepresentedasQ1.,ChangesinEquilibrium,Overthepastfewdecades,supplyanddemandshiftedinmarketforpinksalmon.,ChangeinSupply,Onthesupplyside,improvedtechnologyintheformoflarger,moreefficientfishingboatsgreatlyincreasedthecatchandloweredthecostofobtainingit.,Also,highprofitatpriceP1encouragedmanynewfisherstoentertheindustry.Asaresultofthesechanges,thesupplyofpinksalmongreatlyincreasedandthesupplycurveshiftedtotheright,asfromS1toS2.,ChangeinSupply,ChangeinDemand,Overthesameyears,thedemandforpinksalmondecreased,asrepresentedbytheleftwardshiftofdemandcurve.Thatdecreaseresultedfromincreasesinconsumerincomeandreductionsinthepriceofsubstituteproducts.,Asbuyersincomesincreased,consumersshifteddemandawayfromcannedfishandtowardhigher-qualityfreshorfrozenfish,includinghigher-qualityspeciesofsalmonsuchasChinookandCohosalmon.,ChangeinDemand,Moreover,theemergenceoffishfarming,inwhichsalmonareraisedinnetpens,loweredthepricesofsubstitutespecies.That,too,reducedthedemandforpinksalmon.ThedecreaseofdemandisrepresentedbytheleftwardshiftfromD1toD2.,ChangeinDemand,NewEquilibrium,Theincreasedsupplyof,anddecreaseddemandfor,pinksalmongreatlyreducedtheprice,asrepresentedbythedropfromP1toP2.Boththesupplyincreaseandthedemanddecreasehelpedreducetheequilibriumprice.,However,theequilibriumquantityofpinksalmonincreased,asrepresentedbythemovefromQ1toQ2.Bothshiftsofthecurvesreducedtheequilibriumprice,butequilibr