第61章 佃农理论英语原著 55
- 作者:张五常
- 类型:综合其他
- 更新时间:2021-07-04 15:14:15
- 章节字数:4290字
Recallthatundertherentalsharerestrictionahighertenantinputcosttendstoeabout,andthatthecropschosentoberotatedwillbesel,itwilltendtowardthemaximizationofyieldvalueperacreoflandperperiodoftime.[6]Withthisreasoning,threetypesofcropsaddedatthemarginaredetectedunderthesharerestriction,andIdiscusseachinturnbelow.
TheCropoftheInternalLandMargin
Theterm”landmargin”asitisusedinlandeconomicsusuallyrefersto”arable”inaprivatelyownedfarm,th,thesemarginsincludehillslopesandbadlyerodedfields,,thecropchosenforthismarginallandwascitronella,awildperfumegrasswhichwasnowwidelyintroducedfororganizedcultivation.
Asisshownintable5,[7]Inprefectureranking,theresponseincropareaincreaseisclearlymores,dtoincreasemaybeinterpretedastheresultofagradualuseoflesssuitablelandmarginsforcitronellacultivation,wheretheverylowyieldofmarginalplantingpulleddowntheaveragecrophectareyield.
Presumably,thedecreaseincrophectareyiel,forexample,wherethetotalyieldin1949(5.)wasonlyafractionlowerthanthatin1950(www.youxs.org).,suggestingthattheyieldsfromincrementalcropareaweresolowthatoned,thereisalsothepossibilityofrandomfluctuationsowingtoweather,www.youxs.org(hectare),againconfirmstheverylowyieldofmarginalplantingowingtotheexhaustionofbetterinternallandmargins.
Totheextentthatthetotalyieldonthegiven(physical)landincreasedasaresultofincreasingcroparea(plantingrate),asisclearlythecasewhenwepare1948withanyofthefollowingthreeyears(table5),[8]theaverageproductoflandhadincreased(www.youxs.org).Thisimpliesthatthemarginalproductcurveofcultivatedlandalsoincreased,(cropareatimesthehectareyield)increasedsignificantlymoreinprefecturesofthehigherrankings(rankedaccordingtoproportionsoffarmsaffectedbythesharerestriction),themarginalproductofland,aswasclearlythecaseafter1949,themarginalyieldofincreasingtenantinputsincultivatingincrementalcrophectare(area)tareremainedconstantorincreased,theverylowyieldoftillingtheincrementalcropareaconfirmsthatthemargancewiththeirranking,theevidencealsoconfirmsthatthemarginalproductoffarmingresourcedfrommytheoryofsharetenancy.
CropsoftheInterplantingMargin
,,butcontinuestogrowaloneaftertheinitialcropisharvested,
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