首页其它佃农理论 张五常

第25章 《佃农理论》英语原著 (19)

FromtheaboveSchickele(andHeadyafterhim)"efficient"inputsubsidizationbythelandownerwassought.Usinga50percentrentalshare(r=0.5),andusingthehorizontalaxisoffigure4tomeasurenonlandinputsingeneral,Schickeleconcludedthat"ifthelandlordwouldshareequallyinalltheinputcostsgoingintocropproductiontheintensitywouldbecarriedto[t2],thatis,tothesamedegreewhichcorrespondstomaximumefficiency."[19]Itseconomiccontentaside,whatcouldhavebeenmerelyageometric"accident"

(1-r)intomarginal(output)costcurves,butwiththecurvesarbitrarilydrawn.[20]Thus,onSchic-kele':"Thecostofvariablefactors(whereonefactorsuchaslandisfixed)mustbedividedbetweenthelandlordandthetenantintheproportionsthatholdforthedivisionoftheproduct[toattainefficiency]."[21]Letmeclarify.Returntofigure4,whereweuser=,r,is0.5(thatusedbySchickele).,ifthelandownercontributesnonlandinputsfromt1tot2,hewouldthenbesharingexactlyhalfthenonlandinputcost-orsharingit"intheproportionsthatholdforthedivisionoftheproduct.",recall,is1—rofateverypoint,,butaparadoxicalresultoneobtainswithoutit:Givenanyrentalpercentage,andawageratejusthighenoughtoreducetenantinputtozero(accordingtothetax-equivalentanalysis),thevalueoflandisstillpositive(sincethetotalproductisstillgreaterthanthetotalwage).Woulditbesensibletosay,then,thatincertaincasesthevalueoflandtothetenantisposi-tivebutheisnotwillingtoofferanysharepaymentforitsuse?

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