简介:Thisresearchaimstocomparedifferentstrategiesthatanon-professionalinvestorinexchange-tradedfunds(ETFs)couldemploytoreachagoodperformancebothfromprofitsandfromariskperspective.Inrecentyears,especiallyafterthe2008crisis,anewtechniquetoevaluatetheriskhasbecomemorepopular,theso-calledriskparity,whichseekstoequalisethecontributionstoriskoftheportfolioconstituents.Ourstudyanalyses17variantsofriskparityportfoliodesignforgroupswiththeminimumvariancestrategyandequallyweightedportfoliooverapoolof56ETFs—listedontheItalianStockExchange—ofeightdifferentcategoriesofspecialisation.Empiricalresultsconfirmtheusefulnessofthegroupriskparitystrategiesinimprovingoutcomesregardingdiversificationofrisksamongclasseswithgoodout-of-sampleperformancewithrespectstothetargetmodels.
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简介:Toenlargethemiddle-incomegroupandconstructthe'olivary'incomedistributionbecomesoneoftheimportantissuesoftheeconomicdevelopmentandincomedistributionreforminChina.Theincomedistributionfunctionisestimatedwithkerneldensity,andtheincomedistributionM-curveisconstructedwithCHNSandCHIPdatatocalculatethemiddle-incomegroup.Furthermore,acomparativeanalysisiscarriedoutforthechangingtrendofthesizeandproportionofmiddle-incomegroup.Researchconclusion:itisdiscoveredaccordingtotheincomedistributionM-curvethatthekeytotheenlargementofurbanmiddle-incomegroupliesinthelowermiddle-incomegroup,whilethekeytotheenlargementofruralmiddle-incomegroupliesintheimprovementoftheuppermiddle-incomegroup.Therangeofmiddle-incomegroupisexpanding,butduetothesmallscale,lowproportion,andpoorstability,ithasnotdevelopedthe'olivary'incomedistributionstructureyet,andincomeinequalitytendstobedeepened.
简介:Withtheexploitationofnon-renewablenaturalresourcesinthetraditionalresource-basedenterprises,theresources-waste,environmentalpollutionandecologicaldestructionarebecomingmoreandmoreserious.Underthebackgroundofecologicalcivilizationconstruction,thegreentransformationofresource-basedenterprisesinthewesternregionisextremelyurgent.Throughthereviewofrelatedliteratures,basedonsustainabledevelopmenttheoryanddynamiccapabilitytheory,thepaperstudythebasiccharacteristicsanddifficultiesofwesternresource-basedenterprises,andanalyzetheecologicalnetworkandbasicpathofenterprise.Combinedwiththeactualcase,thisstudyanalyzesthemotivation,conditions,restrictivefactorsandtransitionpathofresource-basedenterprisesgreentransformationinthewesternregionsandthenputsforwardcountermeasuresandsuggestionsfortherealizationofresource-basedenterprisesgreentransformation.
简介:一、问题的提出《排序问题》是运筹学中的一个问题.它可表述为:“n个不同零件需在m台设备上加工,怎样安排零件的加工顺序,使加工所耗的总工时最少?”这一问题,由于加工顺序的编排受多种因素的制约,情况异常复杂,因此,寻找最优排序方案非常困难.只有少数几种简单的情形,它才得到了完善的解决.其中主要有:1.当m=2时,即n种不同零件在两台设备上加工,且工艺顺序相同,或各零件在加工时所通过的设备顺序相同.这种问题的优化,已由Johnson于1954年提出了解决的方法.Johnson规则是:“如果各零件都需先在设备A上加工,然后转入设备B上加工,那末若加工时间短的工序是在A设备上进行的,则安排其零件先加工,若加工时间短的工
简介:摘要:资金管理模式作为集团财务管控重要的组成部分,合适的资金管理模式对资产安全,企业运转效率和企业综合效益有至关重要的作用。企业应从行业、不同发展阶段研究,采取不同的资金管理模式以助力集团战略的达成,增进财务管控价值的创造。
简介:摘要:资金管理模式作为集团财务管控重要的组成部分,合适的资金管理模式对资产安全,企业运转效率和企业综合效益有至关重要的作用。企业应从行业、不同发展阶段研究,采取不同的资金管理模式以助力集团战略的达成,增进财务管控价值的创造。
简介:摘要:新时代新形势给建筑施工企业带来了机遇和挑战,能否取得竞争优势、奠定自己的市场地位,薪酬体系的建立和优化便成为企业生产运营管理中的关键环节之一。
简介:Industrialproductionprocessincludingnitricacidproductionisanimportantgreenhousegasemissionsource.AlthoughIPCCguidelineshavegivencalculationmethodsandemissionfactorsforN2Oemissionfromnitricacidproduction,emissionfactorsofnitricacidproductioninChinaarenotgiven.AnditcanbeseenfromthecomparisonoftheguidelinesandregisteredCDMprojectsinChinathattheN2OemissionfactorsgivenintheIPCCguidelinesandactualN2OemissionfromnitricacidproductioninChinadiffergreatlywhilemeasuredN2Oemissiondataisnotavailable,sodeterminationofemissionfactorsforN2OemissionfromnitricacidproductionisanimportantbasicresearchforN2OemissioncalculationinChina.ThemethodthatcalculateN2OemissionfactorsfromnitricacidproductioninChinaisstudiedwithbaselineemissionfactorsbasedonactualmeasurementofregisteredCDMprojectsandthecalculatedemissionfactoriscomparedwiththatgivenintheIPCCguidelinesinthetext.
简介:摘要:随着银行业金融机构的快速发展,金融转型步伐日益加快,银行业在给金融消费者带来高效服务的同时,也伴随着操作不熟练、程序不简洁、态度不积极等金融纠纷。本文以N市银行业金融机构消费者投诉为切入点,探讨解决金融纠纷存在的问题并提出对策建议。
简介:摘要:为解决纳税服务堵点,更好地服务纳税人,L市S区税务局聚焦当前全区纳税服务中的问题,积极探索“2+N”E体化“四维智税”服务体系,全力打造“十分钟”便民服务圈。关键词:“2+N”E体化;“四维智税”;服务体系