intergenerational governance - 東京大学stake-holders capable of internalising the externalities....

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97 Intergenerational governance SASAKI Dan Governance, despite its popularity as one of the most fashionable contemporary keywords, is far from being defined unanimously and unambiguously. The concept tends to be more frequented in specific contexts such as corporate governance, than in more abstract general frameworks. This makes it nontrivial to extract the transversal conceptualisation of governance. It does seem, however, that the following basic features tend to be commonly observed whenever, in whatever context, governance is discussed. Firstly, it is typically an organisation involving multiple individuals wherein governance becomes the subject of substantive discussions. According to the standard microeconomic theory, an individual decision maker is identified by her/his idiosyncratic preferences. This inevitably means that conflicts of interest arise whenever multiple individuals are to engage in collective decision making. In other words, collective decisions are made possible exclusively through interpersonal utility comparability. Secondly, unlike typical collective optimisation decisions in economic theory, governance ofttimes refers to a problem wherein the objective is either unknown or ambiguous. Viewed more profoundly, collective decision making commences with the task of establishing the objective function per se. Whether the conflict emerges in the choice of the collective objective or in the actual action decisions after having agreed upon the objective, our conventional social choice methods such as democracy tend to suffer two common shortfalls. One is the inaccuracy in aggregating the preferences of the people, possibly resulting in a social decision which fails to optimise the social total surplus. This can arise even when everyone affected by the social decision is represented in the

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Page 1: Intergenerational governance - 東京大学stake-holders capable of internalising the externalities. It is not straightforward to tell predeterministically how long the said postponement

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Intergenerational governance

SASAKIDan

Governance,despiteitspopularityasoneofthemostfashionablecontemporarykeywords, is far frombeingdefinedunanimouslyandunambiguously.Theconcepttends tobemore frequented inspecificcontexts suchascorporategovernance,than inmoreabstract general frameworks.Thismakes itnontrivial to extractthe transversalconceptualisationofgovernance. Itdoesseem,however, that thefollowingbasic features tend tobecommonlyobservedwhenever, inwhatevercontext,governance isdiscussed.Firstly, it is typicallyanorganisation involvingmultiple individualswherein governancebecomes the subject of substantivediscussions.Accordingtothestandardmicroeconomictheory,anindividualdecisionmakeris identifiedbyher/his idiosyncraticpreferences.This inevitablymeansthatconflictsof interestarisewhenevermultiple individualsare toengage incollectivedecisionmaking.Inotherwords,collectivedecisionsaremadepossibleexclusivelythrough interpersonalutility comparability. Secondly, unlike typical collectiveoptimisationdecisionsineconomictheory,governanceofttimesreferstoaproblemwherein theobjective iseitherunknownorambiguous.Viewedmoreprofoundly,collectivedecisionmakingcommenceswith the taskofestablishing theobjectivefunctionperse.

Whethertheconflictemergesinthechoiceofthecollectiveobjectiveorintheactualactiondecisionsafterhavingagreedupon theobjective,ourconventionalsocialchoicemethodssuchasdemocracytendtosuffertwocommonshortfalls.

One is the inaccuracy inaggregating thepreferencesof thepeople,possiblyresulting inasocialdecisionwhich fails tooptimise thesocial totalsurplus.Thiscanariseevenwheneveryoneaffectedbythesocialdecisionisrepresentedinthe

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decisionmakingprocedure. Theotheristhepossiblemisrepresentationofthoseinterestgroupswhocannot,forvariousexogenousreasons,participate inthedecisionprocess. Inotherwords,evenwhencollectivedecisionsaremadedemocraticallyamongst thosewho takepart inthedecisionprocess,theycanspillexternalitiestowardthosestake-holderswhoarenotdecisionmakersthemselves.

The former, the aggregationproblem, typically ariseswhendemocracy isostensiblyequatedwith thesimplisticmajorityrule (whichneednotbeconfinedtothesimplemajority —a.k.a.50percent —rule).Themechanical "onepersononevote" scheme typicallyabstracts theorderofperference, referred toas theordinalutilityineconomictheory,awayfromthestrengththereof,referredtoasthecardinalutility.Suchaschemecanachieveaggregateutilitymaximisation if,andonlyif,each"pro"voteandeach"con"voteareequallyserious.Otherwise,onthoseissueswhichaffectminoritygroupsfarmoreseriouslythantherestofthepolulation,themajorityrulecanbestunninglyoppressiveagainsttheaggregatewellbeingofthesociety.ThispredicamenthaslongbeenknownsinceNazi'ssupposedlydemocraticascention topower in the1930sWeimarRepublicand thesubsequent (andverymuchconsequent)oppressionofethnicandreligiousminorities.Foralargemajorityofvoterswhohadnoclosenon-Aryan friends, the treatmentofminoritieswasnotan imminentpersonalconcern,whichwaswhymanysuchvotersweremoreattracted to the "socialist"partof theNSDAP than repulsedby the "nationalist"part.Meanwhile, for theminoritygroups, the latterwas literally life-threateningand thusmuchmoredisagreeable than thepossibleallureof socialism, thoughtheir life-bettingvotesweremuchtoofew.Anditwasnothingbut theheadcount,withoutregardtotheseriousnessofeachballot,thatwasthesoledeterminantinthe"democratic"arena.

Whatalternativeschemecouldpossiblyaccount for theseriousnessofeachballot?Presumably themost familiar is thebiddingsystem.Thekeydifference isthatconventionalvotersmakenocommitmentinthattheydonotpromisetopayforwhatevertheresultofthedecisionmaybe,whereasbidderspreparetopaythebidpriceincasetheywinthedeal.Whilstonemightspontaneouslyfrownattheideaof

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price-taggingthecivilrights,would itactuallybesuchacorruptsystemto imposeasmallfeetovote?Or,tosecuritiseacertainnumberofvotestotradetheminanopenmarket?Amodestvoting fee justenough todetermanyof those ignorant,uneducated, joblessandnearlypennilessWeimarRepublicansbutaffordable forwell-heeledJewishintellectuals,couldpossiblyhavesalvagedthehumanracefromtheThirdReichandWorldWarIIaltogether.AmodernJapaneseruleofthumbtellsthatarainydayofelectionfavours theCommunistParty, implyingthatmorerainona fewnationalelections tocomemayserveasadivineKamikazeprovidencetoprevent theLDP (in spiteof thePartyname, the JapaneseLibDemsareadowngradedversionof theTorieswithoutLords,Sirs,Dames,andMBEs) ledbyDishonestAbefromlaunchingtheFourthReichandWorldWarIII.

Viewed fromthe flipside,voters'participationratesarenotalways thebestqualitymeasureforelections,inthesensethatcountingmoreoflessseriousballotsmightevencontaminate theotherwiseappropriateaggregationofpublicopinions.Dependinguponthepolicy issues inquestion,somevotersaremore importantasstake-holdersthantheremainderoftheelectoralbody,yetcounted"onepersononevote" in lieuof "oneReichsmarkstakeonevote," running theriskofallowing theunimportantmajoritytopersecutetheimportantminority.

Thelatter,theexternalityissue,canalsobeencompassedbyextrapolatingtheabove-mentioned insight. Importantstake-holders, in thesenseof thosewhoareseriouslyaffectedbythesocialdecisioninquestion,maynotalwaysbepresent inthedecisionmakingprocess.This is typically thecasewhentheexternalitiesareintertemporal,or intergenerational.Generally,any legislationorpolicydecisiontakes effect toward the indefinite future, but not retroactively into the past.Whenever thepresentgenerationdecides to launchapolicyor toratifya law, itinevitablyspillsexternalitiestofuturegenerations.Theseexternalities,however,aredifficult to internalisebecause thosestake-holdersexternal to thedecisionmakingprocedureatpresentare the futuregenerationswho,bydefinition,arenotreadyyet toexpress theirpreferences.This implies thatalmostany legislation,evenif establishedviacontemporarydemocracy, inevitablycreates intergenerationalexternalitieswhich,byconstruction,cannotbefully internalised,resultinginover-

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(resp.,under-)establishmentoflawsandpoliciesentailingnegative(resp.,positive)externalitiestowardthefuture.Therelevantresearchquestionhereishow,throughwhatscheme,wecanpossiblyminimisetheseintergenerationalexternalitiesor,putalternatively,maximisetheirinternalisation.

Aprimeexampleofintergenerationalexternalitiescanbefoundintheexplosionofpublicdebts in recentJapan.Politicianswhoproposeheavy taxation tend tobeunpopularamongstvoters in thepresentgeneration, so that the supposedlydemocraticcongress leans in favourofdebtswhichareultimatelyequivalent topostponementoftaxationtofuturegenerations.Thekeyquestioniswhoeventuallybearsthepostponedtaxestorepaythedebts,inotherwords,whoaretheultimatestake-holderscapableof internalising theexternalities. It isnotstraightforwardtotellpredeterministicallyhowlongthesaidpostponementlasts,andmoregenerally,to foretellhowmuchof the externalities is tobebornebywhichgeneration.This implies that,evenamongst thosewhoparticipate in thedecisionmakingatpresent, theyoungeronesaremore important stake-holders than theelderonesin that theyhave longerremaining lifeexpectancieswhichproportionatelyensuretheiropportunities to internalise the futureeffectsof thepresentdecisions. In theexampleofpublicdebts,theoldervotersarelikelytoescapethepostponedtaxationwhilsttheyoungervotersaremorelikelytobearit induetime.Thereforeifthesevotersareallottedwithballotsproportional to their remaining lifetimesreflectingtheirexpectedcapabilitiestointernalisetheeffectsoftheirowndecisions,itmightserve tocurtail theuninhibitedly irresponsiblepostponementof taxationand theconsequentexplosionofpublicdebts.

Democraticpeace,thegeneralhistoricalfactthatawarisunlikelytobreakoutbetweendemocraticcountries,teachesushowimportantitistoreflecttheopinionsofstake-holderson importantdecisions including,albeitbynomeansconfinedto,nationalsecurity.Onlyasmallminorityofpowerfulpoliticiansandindustrialgiantsprofit fromawar,at theexpenseofmillionsof lives.Therefore, if thedecisionmakingprocedure isdemocraticallyaccurate in thatevery stake-holder isdulyrepresentedaccordingto theirstakes, thenthosemillionswhose livesareatstakenever fail tovoteagainst thewar. Inaddition, there isalsoan intergenerational

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aspect: absolutely no countrywould ever opt to fight awar if themilitaryconscriptionagewerenot18but,say,70.Thisisnotbecause70-year-oldsaretooweakorsedentaryorsickorseniletofight;surelytheycandriveandshoot,evenbetterthan18-year-oldsonaverage,andyetthelossof70-year-oldliveswouldincurconsiderably lessdamagesto thenationaleconomythanthatof18-year-olds.Theonlykeyfactorhereisintertemporality,inthatconscriptionatage70willeventuallydrafteveryonepresentlyyoungerwhothereforeholdsalife-staketoobjectthereto,whereasconscriptionatage18willno longerdraftanyof thepresent-generationvoters.Hence,richoldwarmongersconsumeyoungprospectivelives.

Inostensiblydemocraticcountries today, thehigheststake-holders,underagechildren,havenovotes,and thevoting ratesofyoungadultswhoare thenexthigheststake-holderstendtobelow,whilstthoseoftheold,retiredgenerationarethehighesteventhoughtheirstakesaretheleast.Giventhismismatch,neitherthedebtexplosionnortheriseofreactionarymilitarismisasurprise.Itishightimethatweshouldseriouslyreexamine"onepersononevote"andmorebroadlytheconceptofdemocracyaltogether.

There remainanumberof related issuescalling forextensivediscussions.Firstly,whoshouldbeeligible for thestatusof stake-holders?For instance,whyisenvironmentalprotection important? Is itbecauseanimalsandplants in theirhabitatsinquestionarealsostake-holders,orisitsimplybecausetheenvironmentaffects our indefinite future human generations?AndwhyArticle 13 of theConstitutionofJapanprovidesthatthepeopleshallberespectedasindividuals"totheextentthatitdoesnotinterferewiththepublicwelfare"?Isthe"publicwelfare"equaltotheaggregateutilityofthepeopleasdefinedineconomictheory,inwhichcaseshoulditnotsufficethatthepeopleberespected,fullstop?Oristhe"public"anentityon itsown,outsideof thecollectiveutilityof thepeople?Secondly, istheultimatepurposeofgovernance found in theoptimalallocationof resources,itsefficiencyandfairness, justasassumedineconomictheory?Or is thedecisionmakingprocedure itself, suchas "democracy"and "participation,"aself-purpose?Thirdlyandrelatedly, isgovernanceboundwithanypre-imposedvaluesystem?Ifso,caniteverbeavalue-freescience?CollegeadmissioninJapanistypicallydone

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bywrittenexamsonly,andtermsandconditionssuchasconcessionarytuitionsaresolelyneed-based,whilstelsewhereintheworlditisnotuncommontooffermerit-basedtermsandconditions,whichcanbeviewedaspricingtheadmission.Issuchpricing fair,ornot?Anotherexamplecanbe found incriminalcourts,where thesentencetendstoreflectthecrimethathasbeencommitted,butthisisnotthesameaswhateconomic theory teachesus.Tobeeconomically rational, the sentenceshouldreflect theexpecteddamagethecriminalmight incurto thefuturesociety,notwhathasalreadybeendone.Inthisway,however,attemptedmurdermayneedtobesentencedlongerthancompletedmurder,becausethevictimisstillaliveandthusmightbethreatenedagainbythesameperpetrator.Wouldthatbefair,though?Then, lastbutnot least, is thedoctrine thatscience"should"bevalue-free,value-free?

特集 社会規範と世論の形成