协调失灵CoordinationFailure“协调失灵”理论为宏观经济政策有效性和国家积极干预提供了理论依据。Coordinationfailuretheoryprovidesatheoreticalbasisfortheeffectivenessofmacroeconomicpoliciesandstate’sactiveintervention.“协调失灵”理论揭示了,即使价格具有充分的伸缩性,并且所有的经济当事人都是理性的经济人,市场机制却无法成功地协调整体的经济行动,在经济中会出现各种效率不同的多重均衡。Coordinationfailuretheoryshowsthatevenifthepricehassufficientflexibility,andalleconomicagentsarerationaleconomicmen,marketmechanismscannotsuccessfullycoordinatetheoveralleconomicaction,intheeconomy,therewillbeavarietyofmultipleequilibriathathasdifferentefficiency.多重均衡的存在表明,存在着通过政府干预来把经济从低效率均衡改变为高效率均衡的可能性。因而,政府的宏观经济政策并不是如同新古典经济学家们所声称的那样是无效的。Theexistenceofmultipleequilibriaindicatethatitispossibletochangeinefficientequilibriumtoefficientequilibriumthroughgovernmentintervention.Thus,thegovernment'smacroeconomicpolicyisnotasineffectiveasthatclaimedbyneoclassicaleconomists.“协调失灵”理论还揭示了,在存在多重均衡的情况下,经济当事人的信念或预期可以决定对实际均衡的选择。经济之所以会停留在一个低水平均衡状态,只是因为经济中每个当事人都预期它会这样低,从而没有什么激励因素能够使经济当事人改变他们的行动。CoordinationfailuretheoryalsoshowsthatInthepresenceofmultipleequilibria,economicagents’belieforexpectationscanchoosetheactualequilibrium.Thereasonwhytheeconomywillremainatalowlevelequilibriumisthateveryeconomicagentexpectsthattheleveloftheeconomywillbelow,sothereisnoeconomicincentivetoleteconomicagentschangetheiractions.根据“协调失灵”理论的分析,总需求管理政策的作用不仅是对经济进行“数量”上的调整,而且是对经济运行内部协调机制的调整。Accordingtotheanalysisofcoordinationfailuretheory,theroleofaggregatedemandmanagementpoliciesadjustnotonlyeconomythrough“quantity”,butalsointernalcoordinationmechanismsofeconomicoperation.根据“协调失灵”理论的分析,政府还可以通过政策纠正市场的外部性来调整市场的协调机制,通过诱导经济当事人的行为而达到改变宏观经济状态的目的。Accordingtotheanalysisofcoordinationfailuretheory,governmentcanalsoadjustmarket’scoordinationmechanismsbyexternalmarketpolicies,andinducebehaviorsofeconomicagentstochangethemacroeconomicconditions.新凯恩斯主义的“协调失灵”理论及其政策含义,对于我们研究我国社会主义市场经济中的一些问题,具有一定的借鉴意义。例如,在当前总需求不足制约我国经济进一步增长的形势下,政府在采取扩张性宏观经济政策的同时,还应当采取相应的措施来调整市场的协调机制,影响人们的信念或预期,将人们的预期协调到高水平均衡。在这方面,“协调失灵”理论具有一定的启发意义。NewKeynesiancoordinationfailureTheoryandItsPolicyImplicationsisbenefitforourstudyofChina’ssocialistmarketeconomy.Forexample,underthesituationthatthelackofaggregatedemandconstraintseconomicgrowth,notonlyGovernmentneedtoadoptexpansionarymacroeconomicpolicies,butalsotakeappropriatemeasurestoadjustthecoordinationmechanismsofthemarket,affectpeople'sbeliefsorexpectations,andcoordinatepeople'sexpectationstoahigherlevelofequilibrium.