学科分类
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2 个结果
  • 简介:在日常生活中你遇到过不顺心的事情吗?你是怎样解决的呢?现在一起来看看John和Jenny的对话,他们遇到什么烦心事了呢?你能给他们提什么建议?’

  • 标签: SHOULD COULD 日常生活 对话
  • 简介:Whenwetrytoestimatefutureenvironmentalcostsresultingfromourcurrenteconomicactivities,weusuallycalculatethepresentvalueoftheconsequencesforourfuturegenerationsbyutilizingadiscountrateasastandardeconomicprocedure.Thepopularityofthisprocedureissolelysupportedbyitssimplicitywhichassumes:(1)aperfectfinancialmarketovereven100years,and(2)existenceofastabletimepreferencebetweentwoconsecutiveperiodsforanindividualconsumer.Anapparentdeficiencyofthisapproachisthatthepresentvalueoflifequalityoffuturegenerationsvariestoalargeextentalonganarbitrarilychosendiscountrate.Asamatteroffact,thediscountrate,whichcouldreflectthetimepreferenceas2%or5%,matterswhenwepredictcurrentstrategiesofenvironmentalprotectionforfuturegenerations.Simplyapplyingadiscountratetoevaluatethequalityofourfuturegeneration,withoutclarifyingtheactualproductionmechanismbehindthis,isalmosttothesameasignoringthefactthatallofthegoodsareproducedthroughanactualproductionprocessandthatenvironmentaldegradationreducestheefficiencyofthatprocess.Thegreatestconcernforourfuturegenerationsshouldnotbegivenbyanassumeddiscountrate,sincethediscountrateitselfisdeterminedbyfinancialmarketconditionsatcertainpointsintime.

  • 标签: time PREFERENCE DISCOUNT rate NEGATIVE externalities