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Economic growth can be defined as the increase or improvement in the inflation-adjusted market value of the goods and services produced by an economy over ...
Economicgrowth
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Jumptonavigation
Jumptosearch
Increaseintheinflation-adjustedmarketvalueofthegoodsandservicesproducedbyaneconomyoveracertainamountoftime
Grossdomesticproductrealgrowthrates,1990–1998and1990–2006,inselectedcountriesRateofchangeofgrossdomesticproduct,worldandOrganisationforEconomicCo-operationandDevelopment,since1961
PartofaseriesonMacroeconomics
Basicconcepts
Aggregatedemand
Aggregatesupply
Businesscycle
Deflation
Demandshock
Disinflation
Effectivedemand
Expectations
Adaptive
Rational
Financialcrisis
Growth
Inflation
Demand-pull
Cost-push
Interestrate
Investment
Liquiditytrap
Measuresofnationalincomeandoutput
GDP
GNI
NNI
Microfoundations
Money
Endogenous
Moneycreation
Demandformoney
Liquiditypreference
Moneysupply
Nationalaccounts
SNA
Nominalrigidity
Pricelevel
Recession
Shrinkflation
Stagflation
Supplyshock
Saving
Unemployment
Policies
Fiscal
Monetary
Commercial
Centralbank
Models
IS–LM
AD–AS
Keynesiancross
Multiplier
Accelerator
Phillipscurve
Arrow–Debreu
Harrod–Domar
Solow–Swan
Ramsey–Cass–Koopmans
Overlappinggenerations
Generalequilibrium
DSGE
Endogenousgrowth
Matchingtheory
Mundell–Fleming
Overshooting
NAIRU
Relatedfields
Econometrics
Economicstatistics
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Developmenteconomics
Internationaleconomics
SchoolsMainstream
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MichałKalecki
GunnarMyrdal
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JoanRobinson
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JohnHicks
RichardStone
HymanMinsky
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PaulSamuelson
LawrenceKlein
EdmundPhelps
RobertLucasJr.
EdwardC.Prescott
PeterDiamond
WilliamNordhaus
JosephStiglitz
ThomasJ.Sargent
PaulKrugman
N.GregoryMankiw
Seealso
Macroeconomicmodel
Publicationsinmacroeconomics
Economics
Applied
Microeconomics
Politicaleconomy
Mathematicaleconomics
Moneyportal
Businessportalvte
Economicgrowthcanbedefinedastheincreaseorimprovementintheinflation-adjustedmarketvalueofthegoodsandservicesproducedbyaneconomyovertime.Statisticiansconventionallymeasuresuchgrowthasthepercentrateofincreaseintherealgrossdomesticproduct,orrealGDP.[1]
Growthisusuallycalculatedinrealterms–i.e.,inflation-adjustedterms–toeliminatethedistortingeffectofinflationonthepricesofgoodsproduced.Measurementofeconomicgrowthusesnationalincomeaccounting.[2]Sinceeconomicgrowthismeasuredastheannualpercentchangeofgrossdomesticproduct(GDP),ithasalltheadvantagesanddrawbacksofthatmeasure.Theeconomicgrowth-ratesofcountriesarecommonlycomparedusingtheratiooftheGDPtopopulation(per-capitaincome).[3]
The"rateofeconomicgrowth"referstothegeometricannualrateofgrowthinGDPbetweenthefirstandthelastyearoveraperiodoftime.ThisgrowthraterepresentsthetrendintheaveragelevelofGDPovertheperiod,andignoresanyfluctuationsintheGDParoundthistrend.
Economistsrefertoanincreaseineconomicgrowthcausedbymoreefficientuseofinputs(increasedproductivityoflabor,ofphysicalcapital,ofenergyorofmaterials)asintensivegrowth.Incontrast,GDPgrowthcausedonlybyincreasesintheamountofinputsavailableforuse(increasedpopulation,forexample,ornewterritory)countsasextensivegrowth.[4]
Developmentofnewgoodsandservicesalsogenerateseconomicgrowth.[citationneeded]Asitsohappens,intheU.S.about60%ofconsumerspendingin2013wentongoodsandservicesthatdidnotexistin1869.[5]
Contents
1Measurement
2Long-termgrowth
2.1Growthandinnovation
3DeterminantsofpercapitaGDPgrowth
3.1Productivity
3.2Factoraccumulation
4Otherfactorsaffectinggrowth
4.1Humancapital
4.2Politicalinstitutions
4.3Entrepreneursandnewproducts
4.4Structuralchange
5Growththeories
5.1AdamSmith
5.2TheMalthusiantheory
5.3Classicalgrowththeory
5.4Solow–Swanmodel
5.5Endogenousgrowththeory
5.6Unifiedgrowththeory
6Inequalityandgrowth
6.1Theories
6.2Evidence:reducedform
6.3Evidence:mechanisms
7Importanceoflong-rungrowth
7.1Qualityoflife
7.2Equitablegrowth
8Environmentalimpact
8.1Globalwarming
8.2Resourceconstraint
8.3Energy
9Possibilityofinfiniteeconomicgrowth
10EconomicGrowthonanExample:Armenia
11Seealso
12References
13Furtherreading
14Externallinks
14.1Articlesandlectures
14.2Data
Measurement[edit]
Mainarticle:GrossdomesticproductTheeconomicgrowthrateiscalculatedfromdataonGDPestimatedbycountries'statisticalagencies.TherateofgrowthofGDPpercapitaiscalculatedfromdataonGDPandpeoplefortheinitialandfinalperiodsincludedintheanalysisoftheanalyst.
Long-termgrowth[edit]
Livingstandardsvarywidelyfromcountrytocountry,andfurthermore,thechangeinlivingstandardsovertimevarieswidelyfromcountrytocountry.BelowisatablewhichshowsGDPperpersonandannualizedperpersonGDPgrowthforaselectionofcountriesoveraperiodofabout100years.TheGDPperpersondataareadjustedforinflation,hencetheyare"real".GDPperperson(morecommonlycalled"percapita"GDP)istheGDPoftheentirecountrydividedbythenumberofpeopleinthecountry;GDPperpersonisconceptuallyanalogousto"averageincome".
Economicgrowthbycountry[6]
Country
Period
RealGDPperpersonatbeginningofperiod
RealGDPperpersonatendofperiod
Annualizedgrowthrate
Japan
1890–2008
$1,504
$35,220
2.71%
Brazil
1900–2008
$779
$10,070
2.40%
Mexico
1900–2008
$1,159
$14,270
2.35%
Germany
1870–2008
$2,184
$35,940
2.05%
Canada
1870–2008
$2,375
$36,220
1.99%
China
1900–2008
$716
$6,020
1.99%
UnitedStatesofAmerica
1870–2008
$4,007
$46,970
1.80%
Argentina
1900–2008
$2,293
$14,020
1.69%
UnitedKingdom
1870–2008
$4,808
$36,130
1.47%
India
1900–2008
$675
$2,960
1.38%
Indonesia
1900–2008
$891
$3,830
1.36%
Bangladesh
1900–2008
$623
$1,440
0.78%
SeeminglysmalldifferencesinyearlyGDPgrowthleadtolargechangesinGDPwhencompoundedovertime.Forinstance,intheabovetable,GDPperpersonintheUnitedKingdomintheyear1870was$4,808.AtthesametimeintheUnitedStates,GDPperpersonwas$4,007,lowerthantheUKbyabout20%.However,in2008thepositionswerereversed:GDPperpersonwas$36,130intheUnitedKingdomand$46,970intheUnitedStates,i.e.GDPperpersonintheUSwas30%morethanitwasintheUK.Astheabovetableshows,thismeansthatGDPperpersongrew,onaverage,by1.80%peryearintheUSandby1.47%intheUK.Thus,adifferenceinGDPgrowthbyonlyafewtenthsofapercentperyearresultsinlargedifferencesinoutcomeswhenthegrowthispersistentoverageneration.ThisandotherobservationshaveledsomeeconomiststoviewGDPgrowthasthemostimportantpartofthefieldofmacroeconomics:
...ifwecanlearnaboutgovernmentpolicyoptionsthathaveevensmalleffectsonlong-termgrowthrates,wecancontributemuchmoretoimprovementsinstandardsoflivingthanhasbeenprovidedbytheentirehistoryofmacroeconomicanalysisofcountercyclicalpolicyandfine-tuning.Economicgrowth[is]thepartofmacroeconomicsthatreallymatters.[7]
Growthandinnovation[edit]
CreativeEconomicsThesystemofeconomicgrowthindevelopedregions
IthasbeenobservedthatGDPgrowthisinfluencedbythesizeoftheeconomy.TherelationbetweenGDPgrowthandGDPacrossthecountriesataparticularpointoftimeisconvex.GrowthincreaseswithGDPreachesitsmaximumandthenbeginstodecline.Thereexistssomeextremumvalue.Thisisnotexactlymiddle-incometrap.Itisobservedforbothdevelopedanddevelopingeconomies.Actually,countrieshavingthispropertybelongtoconventionalgrowthdomain.However,theextremumcouldbeextendedbytechnologicalandpolicyinnovationsandsomecountriesmoveintoinnovativegrowthdomainwithhigherlimitingvalues.[8]
DeterminantsofpercapitaGDPgrowth[edit]
HistoricworldGDPpercapita
Innationalincomeaccounting,percapitaoutputcanbecalculatedusingthefollowingfactors:outputperunitoflaborinput(laborproductivity),hoursworked(intensity),thepercentageoftheworking-agepopulationactuallyworking(participationrate)andtheproportionoftheworking-agepopulationtothetotalpopulation(demographics)."TherateofchangeofGDP/populationisthesumoftheratesofchangeofthesefourvariablesplustheircrossproducts."[9]
Economistsdistinguishbetweenlong-runeconomicgrowthandshort-runeconomicchangesinproduction.Short-runvariationineconomicgrowthistermedthebusinesscycle.Generally,economistsattributetheupsanddownsinthebusinesscycletofluctuationsinaggregatedemand.Incontrast,economicgrowthisconcernedwiththelong-runtrendinproductionduetostructuralcausessuchastechnologicalgrowthandfactoraccumulation.
Productivity[edit]
Mainarticle:Productivity-improvingtechnologies
Increasesinlaborproductivity(theratioofthevalueofoutputtolaborinput)havehistoricallybeenthemostimportantsourceofrealpercapitaeconomicgrowth.[10][11][12][13][14]"Inafamousestimate,MITProfessorRobertSolowconcludedthattechnologicalprogresshasaccountedfor80percentofthelong-termriseinU.S.percapitaincome,withincreasedinvestmentincapitalexplainingonlytheremaining20percent."[15]
Increasesinproductivitylowertherealcostofgoods.Overthe20thcenturytherealpriceofmanygoodsfellbyover90%.[16]
Economicgrowthhastraditionallybeenattributedtotheaccumulationofhumanandphysicalcapitalandtheincreaseinproductivityandcreationofnewgoodsarisingfromtechnologicalinnovation.[17]Furtherdivisionoflabour(specialization)isalsofundamentaltorisingproductivity.[18]
Beforeindustrializationtechnologicalprogressresultedinanincreaseinthepopulation,whichwaskeptincheckbyfoodsupplyandotherresources,whichactedtolimitpercapitaincome,aconditionknownastheMalthusiantrap.[19][20]TherapideconomicgrowththatoccurredduringtheIndustrialRevolutionwasremarkablebecauseitwasinexcessofpopulationgrowth,providinganescapefromtheMalthusiantrap.[21]Countriesthatindustrializedeventuallysawtheirpopulationgrowthslowdown,aphenomenonknownasthedemographictransition.
Increasesinproductivityarethemajorfactorresponsibleforpercapitaeconomicgrowth—thishasbeenespeciallyevidentsincethemid-19thcentury.Mostoftheeconomicgrowthinthe20thcenturywasduetoincreasedoutputperunitoflabor,materials,energy,andland(lessinputperwidget).Thebalanceofthegrowthinoutputhascomefromusingmoreinputs.Bothofthesechangesincreaseoutput.Theincreasedoutputincludedmoreofthesamegoodsproducedpreviouslyandnewgoodsandservices.[22]
DuringtheIndustrialRevolution,mechanizationbegantoreplacehandmethodsinmanufacturing,andnewprocessesstreamlinedproductionofchemicals,iron,steel,andotherproducts.[23]Machinetoolsmadetheeconomicalproductionofmetalpartspossible,sothatpartscouldbeinterchangeable.[24](See:Interchangeableparts.)
DuringtheSecondIndustrialRevolution,amajorfactorofproductivitygrowthwasthesubstitutionofinanimatepowerforhumanandanimallabor.Alsotherewasagreatincreaseinpowerassteam-poweredelectricitygenerationandinternalcombustionsupplantedlimitedwindandwaterpower.[23]Sincethatreplacement,thegreatexpansionoftotalpowerwasdrivenbycontinuousimprovementsinenergyconversionefficiency.[25]Othermajorhistoricalsourcesofproductivitywereautomation,transportationinfrastructures(canals,railroads,andhighways),[26][27]newmaterials(steel)andpower,whichincludessteamandinternalcombustionenginesandelectricity.Otherproductivityimprovementsincludedmechanizedagricultureandscientificagricultureincludingchemicalfertilizersandlivestockandpoultrymanagement,andtheGreenRevolution.Interchangeablepartsmadewithmachinetoolspoweredbyelectricmotorsevolvedintomassproduction,whichisuniversallyusedtoday.[24]
Productivityloweredthecostofmostitemsintermsofworktimerequiredtopurchase.Realfoodpricesfellduetoimprovementsintransportationandtrade,mechanizedagriculture,fertilizers,scientificfarmingandtheGreenRevolution.
Greatsourcesofproductivityimprovementinthelate19thcenturywererailroads,steamships,horse-pulledreapersandcombineharvesters,andsteam-poweredfactories.[28][29]Theinventionofprocessesformakingcheapsteelwereimportantformanyformsofmechanizationandtransportation.Bythelate19thcenturybothpricesandweeklyworkhoursfellbecauselesslabor,materials,andenergywererequiredtoproduceandtransportgoods.However,realwagesrose,allowingworkerstoimprovetheirdiet,buyconsumergoodsandaffordbetterhousing.[28]
Massproductionofthe1920screatedoverproduction,whichwasarguablyoneofseveralcausesoftheGreatDepressionofthe1930s.[30]FollowingtheGreatDepression,economicgrowthresumed,aidedinpartbyincreaseddemandforexistinggoodsandservices,suchasautomobiles,telephones,radios,electricityandhouseholdappliances.Newgoodsandservicesincludedtelevision,airconditioningandcommercialaviation(after1950),creatingenoughnewdemandtostabilizetheworkweek.[31]ThebuildingofhighwayinfrastructuresalsocontributedtopostWorldWarIIgrowth,asdidcapitalinvestmentsinmanufacturingandchemicalindustries.[32]ThepostWorldWarIIeconomyalsobenefitedfromthediscoveryofvastamountsofoilaroundtheworld,particularlyintheMiddleEast.ByJohnW.Kendrick'sestimate,three-quartersofincreaseinU.S.percapitaGDPfrom1889to1957wasduetoincreasedproductivity.[14]
EconomicgrowthintheUnitedStatessloweddownafter1973.[33]IncontrastgrowthinAsiahasbeenstrongsincethen,startingwithJapanandspreadingtoFourAsianTigers,China,SoutheastAsia,theIndiansubcontinentandAsiaPacific.[34]In1957SouthKoreahadalowerpercapitaGDPthanGhana,[35]andby2008itwas17timesashighasGhana's.[36]TheJapaneseeconomicgrowthhasslackenedconsiderablysincethelate1980s.
ProductivityintheUnitedStatesgrewatanincreasingratethroughoutthe19thcenturyandwasmostrapidintheearlytomiddledecadesofthe20thcentury.[37][38][39][40][41]U.S.productivitygrowthspikedtowardstheendofthecenturyin1996–2004,duetoanaccelerationintherateoftechnologicalinnovationknownasMoore'slaw.[42][43][44][45]After2004U.S.productivitygrowthreturnedtothelowlevelsof1972–96.[42]
Factoraccumulation[edit]
Capitalineconomicsordinarilyreferstophysicalcapital,whichconsistsofstructures(largestcomponentofphysicalcapital)andequipmentusedinbusiness(machinery,factoryequipment,computersandofficeequipment,constructionequipment,businessvehicles,medicalequipment,etc.).[2]Uptoapointincreasesintheamountofcapitalperworkerareanimportantcauseofeconomicoutputgrowth.Capitalissubjecttodiminishingreturnsbecauseoftheamountthatcanbeeffectivelyinvestedandbecauseofthegrowingburdenofdepreciation.Inthedevelopmentofeconomictheory,thedistributionofincomewasconsideredtobebetweenlaborandtheownersoflandandcapital.[46]InrecentdecadestherehavebeenseveralAsiancountrieswithhighratesofeconomicgrowthdrivenbycapitalinvestment.[47]
Theworkweekdeclinedconsiderablyoverthe19thcentury.[48][49]Bythe1920stheaverageworkweekintheU.S.was49hours,buttheworkweekwasreducedto40hours(afterwhichovertimepremiumwasapplied)aspartoftheNationalIndustrialRecoveryActof1933.
Demographicfactorsmayinfluencegrowthbychangingtheemploymenttopopulationratioandthelaborforceparticipationrate.[10]Industrializationcreatesademographictransitioninwhichbirthratesdeclineandtheaverageageofthepopulationincreases.
Womenwithfewerchildrenandbetteraccesstomarketemploymenttendtojointhelaborforceinhigherpercentages.Thereisareduceddemandforchildlaborandchildrenspendmoreyearsinschool.TheincreaseinthepercentageofwomeninthelaborforceintheU.S.contributedtoeconomicgrowth,asdidtheentranceofthebabyboomersintotheworkforce.[10]
See:Spendingwave
Otherfactorsaffectinggrowth[edit]
Humancapital[edit]
Manytheoreticalandempiricalanalysesofeconomicgrowthattributeamajorroletoacountry'slevelofhumancapital,definedastheskillsofthepopulationortheworkforce.Humancapitalhasbeenincludedinbothneoclassicalandendogenousgrowthmodels.[50][51][52]
Acountry'slevelofhumancapitalisdifficulttomeasuresinceitiscreatedathome,atschool,andonthejob.Economistshaveattemptedtomeasurehumancapitalusingnumerousproxies,includingthepopulation'slevelofliteracy,itslevelofnumeracy,itslevelofbookproduction/capita,itsaveragelevelofformalschooling,itsaveragetestscoreoninternationaltests,anditscumulativedepreciatedinvestmentinformalschooling.Themostcommonly-usedmeasureofhumancapitalisthelevel(averageyears)ofschoolattainmentinacountry,buildinguponthedatadevelopmentofRobertBarroandJong-WhaLee.[53]ThismeasureiswidelyusedbecauseBarroandLeeprovidedatafornumerouscountriesinfive-yearintervalsforalongperiodoftime.
Oneproblemwiththeschoolingattainmentmeasureisthattheamountofhumancapitalacquiredinayearofschoolingisnotthesameatalllevelsofschoolingandisnotthesameinallcountries.Thismeasurealsopresumesthathumancapitalisonlydevelopedinformalschooling,contrarytotheextensiveevidencethatfamilies,neighborhoods,peers,andhealthalsocontributetothedevelopmentofhumancapital.Despitethesepotentiallimitations,TheodoreBretonhasshownthatthismeasurecanrepresenthumancapitalinlog-lineargrowthmodelsbecauseacrosscountriesGDP/adulthasalog-linearrelationshiptoaverageyearsofschooling,whichisconsistentwiththelog-linearrelationshipbetweenworkers'personalincomesandyearsofschoolingintheMincermodel.[54]
Economicgrowthrates(percent,vertical)v.standardizedtestsofstudentachievementindifferentregions,bothadjustedforGDPpercapitain1960
EricHanushekandDennisKimkointroducedmeasuresofstudents'mathematicsandscienceskillsfrominternationalassessmentsintogrowthanalysis.[55]Theyfoundthatthismeasureofhumancapitalwasverysignificantlyrelatedtoeconomicgrowth.EricHanushekandLudgerWößmannhaveextendedthisanalysis.[56][57]TheodoreBretonshowsthatthecorrelationbetweeneconomicgrowthandstudents'averagetestscoresinHanushekandWößmann'sanalysesisactuallyduetotherelationshipincountrieswithlessthaneightyearsofschooling.Heshowsthateconomicgrowthisnotcorrelatedwithaveragescoresinmoreeducatedcountries.[54]HanushekandWößmannfurtherinvestigatewhethertherelationshipofknowledgecapitaltoeconomicgrowthiscausal.Theyshowthatthelevelofstudents'cognitiveskillscanexplaintheslowgrowthinLatinAmericaandtherapidgrowthinEastAsia.[58]
JoergBatenandJanLuitenvanZandenemploybookproductionpercapitaasaproxyforsophisticatedliteracycapabilitiesandfindthat"Countrieswithhighlevelsofhumancapitalformationinthe18thcenturyinitiatedorparticipatedintheindustrializationprocessofthe19thcentury,whereascountrieswithlowlevelsofhumancapitalformationwereunabletodoso,amongthemmanyoftoday'sLessDevelopedCountriessuchasIndia,Indonesia,andChina."[59]
Politicalinstitutions[edit]
Seealso:GreatDivergence§ Propertyrights,GreatDivergence§ Efficiencyofmarketsandstateintervention,andGreatDivergence§ Stateprohibitionofnewtechnology
“Asinstitutionsinfluencebehaviorandincentivesinreallife,theyforgethesuccessorfailureofnations.”[60]
Ineconomicsandeconomichistory,thetransitiontocapitalismfromearliereconomicsystemswasenabledbytheadoptionofgovernmentpoliciesthatfacilitatedcommerceandgaveindividualsmorepersonalandeconomicfreedom.Theseincludednewlawsfavorabletotheestablishmentofbusiness,includingcontractlawandlawsprovidingfortheprotectionofprivateproperty,andtheabolishmentofanti-usurylaws.[61][62]
MuchofthisliteraturewasbuiltonthesuccessstoryoftheBritishstateaftertheGloriousRevolutionof1688,inwhichhighfiscalcapacitycombinedwithconstraintsonthepowerofthekinggeneratedsomerespectfortheruleoflaw.[63][64][65][60]However,othershavequestionedthatthisinstitutionalformulaisnotsoeasilyreplicableelsewhereasachangeintheConstitution—andthetypeofinstitutionscreatedbythatchange—doesnotnecessarilycreateachangeinpoliticalpoweriftheeconomicpowersofthatsocietyarenotalignedwiththenewsetofruleoflawinstitutions.[66]InEngland,adramaticincreaseinthestate'sfiscalcapacityfollowedthecreationofconstraintsonthecrown,butelsewhereinEuropeincreasesinstatecapacityhappenedbeforemajorruleoflawreforms.[67]
Therearemanydifferentwaysthroughwhichstatesachievedstate(fiscal)capacityandthisdifferentcapacityacceleratedorhinderedtheireconomicdevelopment.Thankstotheunderlyinghomogeneityofitslandandpeople,EnglandwasabletoachieveaunifiedlegalandfiscalsystemsincetheMiddleAgesthatenabledittosubstantiallyincreasethetaxesitraisedafter1689.[67]Ontheotherhand,theFrenchexperienceofstatebuildingfacedmuchstrongerresistancefromlocalfeudalpowerskeepingitlegallyandfiscallyfragmenteduntiltheFrenchRevolutiondespitesignificantincreasesinstatecapacityduringtheseventeenthcentury.[68][69]Furthermore,PrussiaandtheHabsburgempire—muchmoreheterogeneousstatesthanEngland—wereabletoincreasestatecapacityduringtheeighteenthcenturywithoutconstrainingthepowersoftheexecutive.[67]Nevertheless,itisunlikelythatacountrywillgenerateinstitutionsthatrespectpropertyrightsandtheruleoflawwithouthavinghadfirstintermediatefiscalandpoliticalinstitutionsthatcreateincentivesforelitestosupportthem.Manyoftheseintermediatelevelinstitutionsreliedoninformalprivate-orderarrangementsthatcombinedwithpublic-orderinstitutionsassociatedwithstates,tolaythefoundationsofmodernruleoflawstates.[67]
Inmanypooranddevelopingcountriesmuchlandandhousingareheldoutsidetheformalorlegalpropertyownershipregistrationsystem.Inmanyurbanareasthepoor"invade"privateorgovernmentlandtobuildtheirhouses,sotheydonotholdtitletotheseproperties.Muchunregisteredpropertyisheldininformalformthroughvariouspropertyassociationsandotherarrangements.Reasonsforextra-legalownershipincludeexcessivebureaucraticredtapeinbuyingpropertyandbuilding.Insomecountries,itcantakeover200stepsandupto14yearstobuildongovernmentland.Othercausesofextra-legalpropertyarefailurestonotarizetransactiondocumentsorhavingdocumentsnotarizedbutfailingtohavethemrecordedwiththeofficialagency.[70]
Nothavingclearlegaltitletopropertylimitsitspotentialtobeusedascollateraltosecureloans,deprivingmanypoorcountriesofoneoftheirmostimportantpotentialsourcesofcapital.Unregisteredbusinessesandlackofacceptedaccountingmethodsareotherfactorsthatlimitpotentialcapital.[70]
Businessesandindividualsparticipatinginunreportedbusinessactivityandownersofunregisteredpropertyfacecostssuchasbribesandpay-offsthatoffsetmuchofanytaxesavoided.[70]
"DemocracyDoesCauseGrowth",accordingtoAcemogluetal.Specifically,"democracyincreasesfutureGDPbyencouraginginvestment,increasingschooling,inducingeconomicreforms,improvingpublicgoodsprovision,andreducingsocialunrest."[71]UNESCOandtheUnitedNationsalsoconsiderthatculturalpropertyprotection,high-qualityeducation,culturaldiversityandsocialcohesioninarmedconflictsareparticularlynecessaryforqualitativegrowth.[72]
AccordingtoDaronAcemoglu,SimonJohnsonandJamesRobinson,thepositivecorrelationbetweenhighincomeandcoldclimateisaby-productofhistory.Europeansadoptedverydifferentcolonizationpoliciesindifferentcolonies,withdifferentassociatedinstitutions.Inplaceswherethesecolonizersfacedhighmortalityrates(e.g.,duetothepresenceoftropicaldiseases),theycouldnotsettlepermanently,andtheywerethusmorelikelytoestablishextractiveinstitutions,whichpersistedafterindependence;inplaceswheretheycouldsettlepermanently(e.g.thosewithtemperateclimates),theyestablishedinstitutionswiththisobjectiveinmindandmodeledthemafterthoseintheirEuropeanhomelands.Inthese'neo-Europes'betterinstitutionsinturnproducedbetterdevelopmentoutcomes.Thus,althoughothereconomistsfocusontheidentityortypeoflegalsystemofthecolonizerstoexplaininstitutions,theseauthorslookattheenvironmentalconditionsinthecoloniestoexplaininstitutions.Forinstance,formercolonieshaveinheritedcorruptgovernmentsandgeopoliticalboundaries(setbythecolonizers)thatarenotproperlyplacedregardingthegeographicallocationsofdifferentethnicgroups,creatinginternaldisputesandconflictsthathinderdevelopment.Inanotherexample,societiesthatemergedincolonieswithoutsolidnativepopulationsestablishedbetterpropertyrightsandincentivesforlong-terminvestmentthanthosewherenativepopulationswerelarge.[73]
InWhyNationsFail,AcemogluandRobinsonsaidthattheEnglishinNorthAmericastartedbytryingtorepeatthesuccessoftheSpanishConquistadorsinextractingwealth(especiallygoldandsilver)fromthecountriestheyhadconquered.ThissystemrepeatedlyfailedfortheEnglish.Theirsuccessesrestedongivinglandandavoiceinthegovernmenttoeverymalesettlertoincentivizeproductivelabor.InVirginiaittooktwelveyearsandmanydeathsfromstarvationbeforethegovernordecidedtotrydemocracy.[74]
Entrepreneursandnewproducts[edit]
Policymakersandscholarsfrequentlyemphasizetheimportanceofentrepreneurshipforeconomicgrowth.However,surprisinglyfewresearchempiricallyexamineandquantifyentrepreneurship'simpactongrowth.Thisisduetoendogeneity—forcesthatdriveeconomicgrowthalsodriveentrepreneurship.Inotherwords,theempiricalanalysisoftheimpactofentrepreneurshipongrowthisdifficultbecauseofthejointdeterminationofentrepreneurshipandeconomicgrowth.Afewpapersusequasi-experimentaldesigns,andhavefoundthatentrepreneurshipandthedensityofsmallbusinessesindeedhaveacausalimpactonregionalgrowth.[75][76]
Anothermajorcauseofeconomicgrowthistheintroductionofnewproductsandservicesandtheimprovementofexistingproducts.Newproductscreatedemand,whichisnecessarytooffsetthedeclineinemploymentthatoccursthroughlabor-savingtechnology(andtoalesserextentemploymentdeclinesduetosavingsinenergyandmaterials).[43][77]IntheU.S.by2013about60%ofconsumerspendingwasforgoodsandservicesthatdidnotexistin1869.Also,thecreationofnewserviceshasbeenmoreimportantthaninventionofnewgoods.[78]
Structuralchange[edit]
Mainarticle:Rostow'sstagesofgrowth
EconomicgrowthintheU.S.andotherdevelopedcountrieswentthroughphasesthataffectedgrowththroughchangesinthelaborforceparticipationrateandtherelativesizesofeconomicsectors.Thetransitionfromanagriculturaleconomytomanufacturingincreasedthesizeofthesectorwithhighoutputperhour(thehigh-productivitymanufacturingsector),whilereducingthesizeofthesectorwithloweroutputperhour(thelowerproductivityagriculturalsector).Eventuallyhighproductivitygrowthinmanufacturingreducedthesectorsize,aspricesfellandemploymentshrankrelativetoothersectors.[79][80]Theserviceandgovernmentsectors,whereoutputperhourandproductivitygrowthislow,sawincreasesintheirsharesoftheeconomyandemploymentduringthe1990s.[10]Thepublicsectorhassincecontracted,whiletheserviceeconomyexpandedinthe2000s.
Thestructuralchangecouldalsobeviewedfromanotherangle.Itispossibletodividerealeconomicgrowthintotwocomponents:anindicatorofextensiveeconomicgrowth—the‘quantitative’GDP—andanindicatoroftheimprovementofthequalityofgoodsandservices—the‘qualitative’GDP.[81]
Growththeories[edit]
AdamSmith[edit]
AdamSmithpioneeredmoderneconomicgrowthandperformancetheoryinhisbookTheWealthofNationsfirstpublishedin1776.Thebookexaminedthecontributionstoproductionoflabor,landandcapital.Itdemonstratedtheeconomicimportanceoflargebuoyantmarketsandindustrialspecialization.Italsodocumentedtheinfluenceofnon-economicfactorssuchasthepolitical-legalenvironmentonnationalprosperity.Smith'sstudycombinedbasiceconomictheorywithpersonalobservationandhistoricaldocumentaryreferences.[82]
TheMalthusiantheory[edit]
Mainarticle:Malthusianism
TheMalthusiantheoryproposesthatovermostofhumanhistorytechnologicalprogresscausedlargerpopulationgrowthbuthadnoimpactonincomepercapitainthelongrun.Accordingtothetheory,whiletechnologicallyadvancedeconomiesoverthisepochwerecharacterizedbyhigherpopulationdensity,theirlevelofincomepercapitawasnotdifferentfromthoseamongtechnologicallyregressedsociety.
TheconceptualfoundationsoftheMalthusiantheorywereformedbyThomasMalthus,[83]andamodernrepresentationoftheseapproachisprovidedbyAshrafandGalor.[84]InlinewiththepredictionsoftheMalthusiantheory,across-countryanalysisfindsasignificantpositiveeffectofthetechnologicallevelonpopulationdensityandaninsignificanteffectonincomepercapitasignificantlyovertheyears1–1500.[84]
Classicalgrowththeory[edit]
Inclassical(Ricardian)economics,thetheoryofproductionandthetheoryofgrowtharebasedonthetheoryorlawofvariableproportions,wherebyincreasingeitherofthefactorsofproduction(labororcapital),whileholdingtheotherconstantandassumingnotechnologicalchange,willincreaseoutput,butatadiminishingratethateventuallywillapproachzero.TheseconceptshavetheiroriginsinThomasMalthus’stheorizingaboutagriculture.Malthus'sexamplesincludedthenumberofseedsharvestedrelativetothenumberofseedsplanted(capital)onaplotoflandandthesizeoftheharvestfromaplotoflandversusthenumberofworkersemployed.[85]SeealsoDiminishingreturns.
Criticismsofclassicalgrowththeoryarethattechnology,animportantfactorineconomicgrowth,isheldconstantandthateconomiesofscaleareignored.[86]
Onepopulartheoryinthe1940swasthebigpushmodel,whichsuggestedthatcountriesneededtojumpfromonestageofdevelopmenttoanotherthroughavirtuouscycle,inwhichlargeinvestmentsininfrastructureandeducationcoupledwithprivateinvestmentswouldmovetheeconomytoamoreproductivestage,breakingfreefromeconomicparadigmsappropriatetoalowerproductivitystage.[87]Theideawasrevivedandformulatedrigorously,inthelate1980sbyKevinMurphy,AndreiShleiferandRobertVishny.[88]
Solow–Swanmodel[edit]
Mainarticle:Solow–Swanmodel
RobertSolowandTrevorSwandevelopedwhateventuallybecamethemainmodelusedingrowtheconomicsinthe1950s.[89][90]Thismodelassumesthattherearediminishingreturnstocapitalandlabor.Capitalaccumulatesthroughinvestment,butitslevelorstockcontinuallydecreasesduetodepreciation.Duetothediminishingreturnstocapital,withincreasesincapital/workerandabsenttechnologicalprogress,economicoutput/workereventuallyreachesapointwherecapitalperworkerandeconomicoutput/workerremainconstantbecauseannualinvestmentincapitalequalsannualdepreciation.Thisconditioniscalledthe'steadystate'.
IntheSolow–Swanmodelifproductivityincreasesthroughtechnologicalprogress,thenoutput/workerincreasesevenwhentheeconomyisinthesteadystate.Ifproductivityincreasesataconstantrate,output/workeralsoincreasesatarelatedsteady-staterate.Asaconsequence,growthinthemodelcanoccureitherbyincreasingtheshareofGDPinvestedorthroughtechnologicalprogress.ButatwhatevershareofGDPinvested,capital/workereventuallyconvergesonthesteadystate,leavingthegrowthrateofoutput/workerdeterminedonlybytherateoftechnologicalprogress.Asaconsequence,withworldtechnologyavailabletoallandprogressingataconstantrate,allcountrieshavethesamesteadystaterateofgrowth.EachcountryhasadifferentlevelofGDP/workerdeterminedbytheshareofGDPitinvests,butallcountrieshavethesamerateofeconomicgrowth.ImplicitlyinthismodelrichcountriesarethosethathaveinvestedahighshareofGDPforalongtime.PoorcountriescanbecomerichbyincreasingtheshareofGDPtheyinvest.Oneimportantpredictionofthemodel,mostlyborneoutbythedata,isthatofconditionalconvergence;theideathatpoorcountrieswillgrowfasterandcatchupwithrichcountriesaslongastheyhavesimilarinvestment(andsaving)ratesandaccesstothesametechnology.
TheSolow–Swanmodelisconsideredan"exogenous"growthmodelbecauseitdoesnotexplainwhycountriesinvestdifferentsharesofGDPincapitalnorwhytechnologyimprovesovertime.Instead,therateofinvestmentandtherateoftechnologicalprogressareexogenous.Thevalueofthemodelisthatitpredictsthepatternofeconomicgrowthoncethesetworatesarespecified.Itsfailuretoexplainthedeterminantsoftheseratesisoneofitslimitations.
Althoughtherateofinvestmentinthemodelisexogenous,undercertainconditionsthemodelimplicitlypredictsconvergenceintheratesofinvestmentacrosscountries.Inaglobaleconomywithaglobalfinancialcapitalmarket,financialcapitalflowstothecountrieswiththehighestreturnoninvestment.IntheSolow-Swanmodelcountrieswithlesscapital/worker(poorcountries)haveahigherreturnoninvestmentduetothediminishingreturnstocapital.Asaconsequence,capital/workerandoutput/workerinaglobalfinancialcapitalmarketshouldconvergetothesamelevelinallcountries.[91]Sincehistoricallyfinancialcapitalhasnotflowedtothecountrieswithlesscapital/worker,thebasicSolow–Swanmodelhasaconceptualflaw.Beginninginthe1990s,thisflawhasbeenaddressedbyaddingadditionalvariablestothemodelthatcanexplainwhysomecountriesarelessproductivethanothersand,therefore,donotattractflowsofglobalfinancialcapitaleventhoughtheyhaveless(physical)capital/worker.
Inpractice,convergencewasrarelyachieved.In1957,SolowappliedhismodeltodatafromtheU.S.grossnationalproducttoestimatecontributions.Thisshowedthattheincreaseincapitalandlaborstockonlyaccountedforabouthalfoftheoutput,whilethepopulationincreaseadjustmentstocapitalexplainedeighth.ThisremainingunaccountedgrowthoutputisknownastheSolowResidual.HeretheAof(t)"technicalprogress"wasthereasonforincreasedoutput.Nevertheless,themodelstillhadflaws.Itgavenoroomforpolicytoinfluencethegrowthrate.FewattemptswerealsomadebytheRANDCorporationthenon-profitthinktankandfrequentlyvisitingeconomistKennethArrowtoworkoutthekinksinthemodel.Theysuggestedthatnewknowledgewasindivisibleandthatitisendogenouswithacertainfixedcost.Arrow'sfurtherexplainedthatnewknowledgeobtainedbyfirmscomesfrompracticeandbuiltamodelthat"knowledge"accumulatedthroughexperience.[92]
AccordingtoHarrod,thenaturalgrowthrateisthemaximumrateofgrowthallowedbytheincreaseofvariableslikepopulationgrowth,technologicalimprovementandgrowthinnaturalresources.
Infact,thenaturalgrowthrateisthehighestattainablegrowthratewhichwouldbringaboutthefullestpossibleemploymentoftheresourcesexistingintheeconomy.
Endogenousgrowththeory[edit]
Mainarticle:Endogenousgrowththeory
UnsatisfiedwiththeassumptionofexogenoustechnologicalprogressintheSolow–Swanmodel,economistsworkedto"endogenize"(i.e.,explainit"fromwithin"themodels)productivitygrowthinthe1980s;theresultingendogenousgrowththeory,mostnotablyadvancedbyRobertLucas,Jr.andhisstudentPaulRomer,includesamathematicalexplanationoftechnologicaladvancement.[17][93]Thismodelalsoincorporatedanewconceptofhumancapital,theskillsandknowledgethatmakeworkersproductive.Unlikephysicalcapital,humancapitalhasincreasingratesofreturn.Researchdoneinthisareahasfocusedonwhatincreaseshumancapital(e.g.education)ortechnologicalchange(e.g.innovation).[94]
OnMemorialDayweekendin1988,aconferenceinBuffalobroughttogetherthegreatmindsineconomicstheideawastoevaluatetheconflictingtheoriesofgrowth.Romer,Krugman,Barro,Beckerwereinattendancealongwithmanyotherrisingstarsandhighprofiledeconomistsofthetime.AmongstmanypapersthatdaytheonethatstoodoutwasRomer's"MicroFoundationsforAggregateTechnologicalChange."TheMicroFoundationclaimedthatendogenoustechnologicalchangehadtheconceptofIntellectualPropertyimbeddedandthatknowledgeisaninputandoutputofproduction.Romerarguedthatoutcomestothenationalgrowthratesweresignificantlyaffectedbypublicpolicy,tradeactivity,andintellectualproperty.Hestressedthatcumulativecapitalandspecializationwerekey,andthatnotonlypopulationgrowthcanincreasecapitalofknowledge,itwashumancapitalthatisspecificallytrainedinharvestingnewideas.[95]
Whileintellectualpropertymaybeimportant,Baker(2016)citesmultiplesourcesclaimingthat"strongerpatentprotectionseemstobeassociatedwithslowergrowth".That'sparticularlytrueforpatentsintheethicalhealthcareindustry.Ineffecttaxpayerspaytwicefornewdrugsanddiagnosticprocedures:Firstintaxsubsidiesandsecondforthehighpricesofdiagnosticprocedurestreatments.Iftheresultsofresearchpaidbytaxpayerswereplacedinthepublicdomain,Bakerclaimsthatpeopleeverywherewouldbehealthier,becausebetterdiagnosesandtreatmentwouldbemoreaffordabletheworldover.[96]
OnebranchofendogenousgrowththeorywasdevelopedonthefoundationsoftheSchumpeteriantheory,namedafterthe20th-centuryAustrianeconomistJosephSchumpeter.[97]Theapproachexplainsgrowthasaconsequenceofinnovationandaprocessofcreativedestructionthatcapturesthedualnatureoftechnologicalprogress:intermsofcreation,entrepreneursintroducenewproductsorprocessesinthehopethattheywillenjoytemporarymonopoly-likeprofitsastheycapturemarkets.Indoingso,theymakeoldtechnologiesorproductsobsolete.Thiscanbeseenasanannulmentofprevioustechnologies,whichmakesthemobsolete,and"destroystherentsgeneratedbypreviousinnovations".[98]: 855 [99]AmajormodelthatillustratesSchumpeteriangrowthistheAghion–Howittmodel [ru].[100][98]
Unifiedgrowththeory[edit]
Mainarticle:Unifiedgrowththeory
UnifiedgrowththeorywasdevelopedbyOdedGalorandhisco-authorstoaddresstheinabilityofendogenousgrowththeorytoexplainkeyempiricalregularitiesinthegrowthprocessesofindividualeconomiesandtheworldeconomyasawhole.[101][102]Unlikeendogenousgrowththeorythatfocusesentirelyonthemoderngrowthregimeandisthereforeunabletoexplaintherootsofinequalityacrossnations,unifiedgrowththeorycapturesinasingleframeworkthefundamentalphasesoftheprocessofdevelopmentinthecourseofhumanhistory:(i)theMalthusianepochthatwasprevalentovermostofhumanhistory,(ii)theescapefromtheMalthusiantrap,(iii)theemergenceofhumancapitalasacentralelementinthegrowthprocess,(iv)theonsetofthefertilitydecline,(v)theoriginsofthemoderneraofsustainedeconomicgrowth,and(vi)therootsofdivergenceinincomepercapitaacrossnationsinthepasttwocenturies.Thetheorysuggeststhatduringmostofhumanexistence,technologicalprogresswasoffsetbypopulationgrowth,andlivingstandardswerenearsubsistenceacrosstimeandspace.However,thereinforcinginteractionbetweentherateoftechnologicalprogressandthesizeandcompositionofthepopulationhasgraduallyincreasedthepaceoftechnologicalprogress,enhancingtheimportanceofeducationintheabilityofindividualstoadapttothechangingtechnologicalenvironment.Theriseintheallocationofresourcestowardseducationtriggeredafertilitydeclineenablingeconomiestoallocatealargershareofthefruitsoftechnologicalprogresstoasteadyincreaseinincomepercapita,ratherthantowardsthegrowthofpopulation,pavingthewayfortheemergenceofsustainedeconomicgrowth.Thetheoryfurthersuggeststhatvariationsinbiogeographicalcharacteristics,aswellasculturalandinstitutionalcharacteristics,havegeneratedadifferentialpaceoftransitionfromstagnationtogrowthacrosscountriesandconsequentlydivergenceintheirincomepercapitaoverthepasttwocenturies.[101][102]
Inequalityandgrowth[edit]
Theories[edit]
Furtherinformation:EconomicinequalityandEffectsofeconomicinequality
Theprevailingviewsabouttheroleofinequalityinthegrowthprocesshasradicallyshiftedinthepastcentury.[103]
Theclassicalperspective,asexpressedbyAdamSmith,andothers,suggeststhatinequalityfostersthegrowthprocess.[104][105]Specifically,sincetheaggregatesavingincreaseswithinequalityduetohigherpropertytosaveamongthewealthy,theclassicalviewpointsuggeststhatinequalitystimulatescapitalaccumulationandthereforeeconomicgrowth.[106]
TheNeoclassicalperspectivethatisbasedonrepresentativeagentapproachdeniestheroleofinequalityinthegrowthprocess.Itsuggeststhatwhilethegrowthprocessmayaffectinequality,incomedistributionhasnoimpactonthegrowthprocess.
Themodernperspectivewhichhasemergedinthelate1980ssuggests,incontrast,thatincomedistributionhasasignificantimpactonthegrowthprocess.Themodernperspective,originatedbyGalorandZeira,[107][108]highlightstheimportantroleofheterogeneityinthedeterminationofaggregateeconomicactivity,andeconomicgrowth.Inparticular,GalorandZeiraarguethatsincecreditmarketsareimperfect,inequalityhasanenduringimpactonhumancapitalformation,thelevelofincomepercapita,andthegrowthprocess.[109]Incontrasttotheclassicalparadigm,whichunderlinedthepositiveimplicationsofinequalityforcapitalformationandeconomicgrowth,GalorandZeiraarguethatinequalityhasanadverseeffectonhumancapitalformationandthedevelopmentprocess,inallbuttheverypooreconomies.
Latertheoreticaldevelopmentshavereinforcedtheviewthatinequalityhasanadverseeffectonthegrowthprocess.Specifically,AlesinaandRodrikandPerssonandTabelliniadvanceapoliticaleconomymechanismandarguethatinequalityhasanegativeimpactoneconomicdevelopmentsinceitcreatesapressurefordistortionaryredistributivepoliciesthathaveanadverseeffectoninvestmentandeconomicgrowth.[110][111]
Inaccordancewiththecreditmarketimperfectionapproach,astudybyRobertoPerottishowedthatinequalityisassociatedwithlowerlevelofhumancapitalformation(education,experience,apprenticeship)andhigherleveloffertility,whilelowerlevelofhumancapitalisassociatedwithlowergrowthandlowerlevelsofeconomicgrowth.Incontrast,hisexaminationofthepoliticaleconomychannelfoundnosupportforthepoliticaleconomymechanism.[112]Consequently,thepoliticaleconomyperspectiveontherelationshipbetweeninequalityandgrowthhavebeenrevisedandlaterstudieshaveestablishedthatinequalitymayprovideanincentivefortheelitetoblockredistributivepoliciesandinstitutionalchanges.Inparticular,inequalityinthedistributionoflandownershipprovidesthelandedelitewithanincentivetolimitthemobilityofruralworkersbydeprivingthemfromeducationandbyblockingthedevelopmentoftheindustrialsector.[113]
Aunifiedtheoryofinequalityandgrowththatcapturesthatchangingroleofinequalityinthegrowthprocessoffersareconciliationbetweentheconflictingpredictionsofclassicalviewpointthatmaintainedthatinequalityisbeneficialforgrowthandthemodernviewpointthatsuggeststhatinthepresenceofcreditmarketimperfections,inequalitypredominantlyresultsinunderinvestmentinhumancapitalandlowereconomicgrowth.Thisunifiedtheoryofinequalityandgrowth,developedbyOdedGalorandOmerMoav,[114]suggeststhattheeffectofinequalityonthegrowthprocesshasbeenreversedashumancapitalhasreplacedphysicalcapitalasthemainengineofeconomicgrowth.Intheinitialphasesofindustrialization,whenphysicalcapitalaccumulationwasthedominatingsourceofeconomicgrowth,inequalityboostedthedevelopmentprocessbydirectingresourcestowardindividualswithhigherpropensitytosave.However,inlaterphases,ashumancapitalbecomethemainengineofeconomicgrowth,moreequaldistributionofincome,inthepresenceofcreditconstraints,stimulatedinvestmentinhumancapitalandeconomicgrowth.
In2013,FrencheconomistThomasPikettypostulatedthatinperiodswhentheaverageannualrateonreturnoninvestmentincapital(r)exceedstheaverageannualgrowthineconomicoutput(g),therateofinequalitywillincrease.[115]AccordingtoPiketty,thisisthecasebecausewealththatisalreadyheldorinherited,whichisexpectedtogrowattherater,willgrowataratefasterthanwealthaccumulatedthroughlabor,whichismorecloselytiedtog.Anadvocateofreducinginequalitylevels,Pikettysuggestslevyingaglobalwealthtaxinordertoreducethedivergenceinwealthcausedbyinequality.
Evidence:reducedform[edit]
ThereducedformempiricalrelationshipbetweeninequalityandgrowthwasstudiedbyAlbertoAlesinaandDaniRodrik,andTorstenPerssonandGuidoTabellini.[110][111]Theyfindthatinequalityisnegativelyassociatedwitheconomicgrowthinacross-countryanalysis.
RobertBarroreexaminedthereducedformrelationshipbetweeninequalityoneconomicgrowthinapanelofcountries.[116]Hearguesthatthereis"littleoverallrelationbetweenincomeinequalityandratesofgrowthandinvestment".However,hisempiricalstrategylimitsitsapplicabilitytotheunderstandingoftherelationshipbetweeninequalityandgrowthforseveralreasons.First,hisregressionanalysiscontrolforeducation,fertility,investment,anditthereforeexcludes,byconstruction,theimportanteffectofinequalityongrowthviaeducation,fertility,andinvestment.Hisfindingssimplyimplythatinequalityhasnodirecteffectongrowthbeyondtheimportantindirecteffectsthroughthemainchannelsproposedintheliterature.Second,hisstudyanalyzestheeffectofinequalityontheaveragegrowthrateinthefollowing10years.However,existingtheoriessuggestthattheeffectofinequalitywillbeobservedmuchlater,asisthecaseinhumancapitalformation,forinstance.Third,theempiricalanalysisdoesnotaccountforbiasesthataregeneratedbyreversecausalityandomittedvariables.
Recentpapersbasedonsuperiordata,findnegativerelationshipbetweeninequalityandgrowth.AndrewBergandJonathanOstryoftheInternationalMonetaryFund,findthat"lowernetinequalityisrobustlycorrelatedwithfasterandmoredurablegrowth,controllingforthelevelofredistribution".[117]Likewise,DierkHerzerandSebastianVollmerfindthatincreasedincomeinequalityreduceseconomicgrowth.[118]
Evidence:mechanisms[edit]
TheGalorandZeira'smodelpredictsthattheeffectofrisinginequalityonGDPpercapitaisnegativeinrelativelyrichcountriesbutpositiveinpoorcountries.[107][108]Thesetestablepredictionshavebeenexaminedandconfirmedempiricallyinrecentstudies.[119][120]Inparticular,BrücknerandLedermantestthepredictionofthemodelbyinthepanelofcountriesduringtheperiod1970–2010,byconsideringtheimpactoftheinteractionbetweenthelevelofincomeinequalityandtheinitiallevelofGDPpercapita.Inlinewiththepredictionsofthemodel,theyfindthatatthe25thpercentileofinitialincomeintheworldsample,a1percentagepointincreaseintheGinicoefficientincreasesincomepercapitaby2.3%,whereasatthe75thpercentileofinitialincomea1percentagepointincreaseintheGinicoefficientdecreasesincomepercapitaby-5.3%.Moreover,theproposedhumancapitalmechanismthatmediatestheeffectofinequalityongrowthintheGalor-Zeiramodelisalsoconfirmed.Increasesinincomeinequalityincreasehumancapitalinpoorcountriesbutreduceitinhighandmiddle-incomecountries.
ThisrecentsupportforthepredictionsoftheGalor-Zeiramodelisinlinewithearlierfindings.RobertoPerottishowedthatinaccordancewiththecreditmarketimperfectionapproach,developedbyGalorandZeira,inequalityisassociatedwithlowerlevelofhumancapitalformation(education,experience,apprenticeship)andhigherleveloffertility,whilelowerlevelofhumancapitalisassociatedwithlowerlevelsofeconomicgrowth.[112]PrincetoneconomistRolandBenabou'sfindsthatthegrowthprocessofKoreaandthePhilippines"arebroadlyconsistentwiththecredit-constrainedhuman-capitalaccumulationhypothesis".[121]Inaddition,AndrewBergandJonathanOstry[117]suggestthatinequalityseemstoaffectgrowththroughhumancapitalaccumulationandfertilitychannels.
Incontrast,Perottiarguesthatthepoliticaleconomymechanismisnotsupportedempirically.Inequalityisassociatedwithlowerredistribution,andlowerredistribution(under-investmentineducationandinfrastructure)isassociatedwithlowereconomicgrowth.[112]
Importanceoflong-rungrowth[edit]
Overlongperiodsoftime,evensmallratesofgrowth,suchasa2%annualincrease,havelargeeffects.Forexample,theUnitedKingdomexperienceda1.97%averageannualincreaseinitsinflation-adjustedGDPbetween1830and2008.[122]In1830,theGDPwas41,373millionpounds.Itgrewto1,330,088millionpoundsby2008.Agrowthratethataveraged1.97%over178yearsresultedina32-foldincreaseinGDPby2008.
Thelargeimpactofarelativelysmallgrowthrateoveralongperiodoftimeisduetothepowerofexponentialgrowth.Theruleof72,amathematicalresult,statesthatifsomethinggrowsattherateofx%peryear,thenitslevelwilldoubleevery72/xyears.Forexample,agrowthrateof2.5%perannumleadstoadoublingoftheGDPwithin28.8years,whilstagrowthrateof8%peryearleadstoadoublingofGDPwithinnineyears.Thus,asmalldifferenceineconomicgrowthratesbetweencountriescanresultinverydifferentstandardsoflivingfortheirpopulationsifthissmalldifferencecontinuesformanyyears.
Qualityoflife[edit]
Onetheorythatrelateseconomicgrowthwithqualityoflifeisthe"ThresholdHypothesis",whichstatesthateconomicgrowthuptoapointbringswithitanincreaseinqualityoflife.Butatthatpoint–calledthethresholdpoint–furthereconomicgrowthcanbringwithitadeteriorationinqualityoflife.[123]Thisresultsinanupside-down-U-shapedcurve,wherethevertexofthecurverepresentsthelevelofgrowththatshouldbetargeted.HappinesshasbeenshowntoincreasewithGDPpercapita,atleastuptoalevelof$15,000perperson.[124]
Economicgrowthhastheindirectpotentialtoalleviatepoverty,asaresultofasimultaneousincreaseinemploymentopportunitiesandincreasedlaborproductivity.[125]AstudybyresearchersattheOverseasDevelopmentInstitute(ODI)of24countriesthatexperiencedgrowthfoundthatin18cases,povertywasalleviated.[125]
Insomeinstances,qualityoflifefactorssuchashealthcareoutcomesandeducationalattainment,aswellassocialandpoliticalliberties,donotimproveaseconomicgrowthoccurs.[126][dubious–discuss]
Productivityincreasesdonotalwaysleadtoincreasedwages,ascanbeseenintheUnitedStates,wherethegapbetweenproductivityandwageshasbeenrisingsincethe1980s.[125]
Equitablegrowth[edit]
Mainarticle:Inclusivegrowth
Whileacknowledgingthecentralroleeconomicgrowthcanpotentiallyplayinhumandevelopment,povertyreductionandtheachievementoftheMillenniumDevelopmentGoals,itisbecomingwidelyunderstoodamongstthedevelopmentcommunitythatspecialeffortsmustbemadetoensurepoorersectionsofsocietyareabletoparticipateineconomicgrowth.[127][128][129]Theeffectofeconomicgrowthonpovertyreduction–thegrowthelasticityofpoverty–candependontheexistinglevelofinequality.[130][131]Forinstance,withlowinequalityacountrywithagrowthrateof2%perheadand40%ofitspopulationlivinginpoverty,canhalvepovertyintenyears,butacountrywithhighinequalitywouldtakenearly60yearstoachievethesamereduction.[132][133]InthewordsoftheSecretaryGeneraloftheUnitedNationsBanKi-Moon:"Whileeconomicgrowthisnecessary,itisnotsufficientforprogressonreducingpoverty."[127]
Environmentalimpact[edit]
Seealso:TheLimitstoGrowthandOverconsumption
CriticssuchastheClubofRomearguethatanarrowviewofeconomicgrowth,combinedwithglobalization,iscreatingascenariowherewecouldseeasystemiccollapseofourplanet'snaturalresources.[134][135]
Themarginalcostsofagrowingeconomymaygraduallyexceedthemarginalbenefits,howevermeasured.
Concernsaboutnegativeenvironmentaleffectsofgrowthhavepromptedsomepeopletoadvocatelowerlevelsofgrowth,ortheabandoningofgrowthaltogether.Inacademia,conceptslikeuneconomicgrowth,steady-stateeconomyanddegrowthhavebeendevelopedinordertoachievethisandtoovercomepossiblegrowthimperatives.Inpolitics,greenpartiesembracetheGlobalGreensCharter,recognisingthat"...thedogmaofeconomicgrowthatanycostandtheexcessiveandwastefuluseofnaturalresourceswithoutconsideringEarth'scarryingcapacity,arecausingextremedeteriorationintheenvironmentandamassiveextinctionofspecies."[136]: 2
The2019GlobalAssessmentReportonBiodiversityandEcosystemServicespublishedbytheUnitedNations'IntergovernmentalScience-PolicyPlatformonBiodiversityandEcosystemServiceswarnedthatgiventhesubstantiallossofbiodiversity,societyshouldnotfocussolelyoneconomicgrowth.[137][138]AnthropologistEduardoS.Brondizio,oneoftheco-chairsofthereport,said"Weneedtochangeournarratives.Bothourindividualnarrativesthatassociatewastefulconsumptionwithqualityoflifeandwithstatus,andthenarrativesoftheeconomicsystemsthatstillconsiderthatenvironmentaldegradationandsocialinequalityareinevitableoutcomesofeconomicgrowth.Economicgrowthisameansandnotanend.Weneedtolookforthequalityoflifeoftheplanet."[139]
Thosemoreoptimisticabouttheenvironmentalimpactsofgrowthbelievethat,thoughlocalizedenvironmentaleffectsmayoccur,large-scaleecologicaleffectsareminor.Theargument,asstatedbycommentatorJulianLincolnSimon,statesthatiftheseglobal-scaleecologicaleffectsexist,humaningenuitywillfindwaystoadapttothem.[140]ConverselyParthaDasgupta,ina2021reportontheeconomicsofbiodiversitycommissionedbytheBritishTreasury,arguesthatbiodiversityiscollapsingfasterthanatanytimeinhumanhistoryasaresultofthedemandsofcontemporaryhumancivilization,which"farexceednature'scapacitytosupplyuswiththegoodsandservicesweallrelyon.Wewouldrequire1.6Earthstomaintaintheworld'scurrentlivingstandards."Hesaysthatmajortransformativechangeswillbeneeded"akinto,orevengreaterthan,thoseoftheMarshallPlan,"includingabandoningGDPasameasureofeconomicsuccessandsocietalprogress.[141]
In2019,awarningonclimatechangesignedby11,000scientistsfromover150nationssaideconomicgrowthisthedrivingforcebehindthe"excessiveextractionofmaterialsandoverexploitationofecosystems"andthatthis"mustbequicklycurtailedtomaintainlong-termsustainabilityofthebiosphere."Theyaddthat"ourgoalsneedtoshiftfromGDPgrowthandthepursuitofaffluencetowardsustainingecosystemsandimprovinghumanwell-beingbyprioritizingbasicneedsandreducinginequality."[142][143]A2021paperauthoredbytopscientistsinFrontiersinConservationSciencepositedthatgiventheenvironmentalcrisesincludingbiodiversitylossandclimatechange,andpossible"ghastlyfuture"facinghumanity,theremustbe"fundamentalchangestoglobalcapitalism,"includingthe"abolitionofperpetualeconomicgrowth."[144][145][146]
Globalwarming[edit]
Seealso:Economicsofglobalwarming
Uptothepresent,thereisaclosecorrelationbetweeneconomicgrowthandtherateofcarbondioxideemissionsacrossnations,althoughthereisalsoaconsiderabledivergenceincarbonintensity(carbonemissionsperGDP).[147]Uptothepresent,thereisalsoadirectrelationbetweenglobaleconomicwealthandtherateofglobalemissions.[148]TheSternReviewnotesthatthepredictionthat,"Underbusinessasusual,globalemissionswillbesufficienttopropelgreenhousegasconcentrationstoover550ppmCO2by2050andover650–700ppmbytheendofthiscenturyisrobusttoawiderangeofchangesinmodelassumptions."Thescientificconsensusisthatplanetaryecosystemfunctioningwithoutincurringdangerousrisksrequiresstabilizationat450–550ppm.[149]
Asaconsequence,growth-orientedenvironmentaleconomistsproposegovernmentinterventionintoswitchingsourcesofenergyproduction,favouringwind,solar,hydroelectric,andnuclear.Thiswouldlargelyconfineuseoffossilfuelstoeitherdomesticcookingneeds(suchasforkeroseneburners)orwherecarboncaptureandstoragetechnologycanbecost-effectiveandreliable.[150]TheSternReview,publishedbytheUnitedKingdomGovernmentin2006,concludedthataninvestmentof1%ofGDP(laterchangedto2%)wouldbesufficienttoavoidtheworsteffectsofclimatechange,andthatfailuretodosocouldriskclimate-relatedcostsequalto20%ofGDP.Becausecarboncaptureandstorageareasyetwidelyunproven,anditslongtermeffectiveness(suchasincontainingcarbondioxide'leaks')unknown,andbecauseofcurrentcostsofalternativefuels,thesepolicyresponseslargelyrestonfaithoftechnologicalchange.
BritishconservativepoliticianandjournalistNigelLawsonhasdeemedcarbonemissiontradingan'inefficientsystemofrationing'.Instead,hefavourscarbontaxestomakefulluseoftheefficiencyofthemarket.However,inordertoavoidthemigrationofenergy-intensiveindustries,thewholeworldshouldimposesuchatax,notjustBritain,Lawsonpointedout.Thereisnopointintakingtheleadifnobodyfollowssuit.[151]
Resourceconstraint[edit]
Seealso:Energyreturnedonenergyinvested,Substitutegood,Mining,Peakminerals,andSteady-stateeconomy§ Presentsituation:Exceedinggloballimitstogrowth
Manyearlierpredictionsofresourcedepletion,suchasThomasMalthus'1798predictionsaboutapproachingfaminesinEurope,ThePopulationBomb,[152][153]andtheSimon–Ehrlichwager(1980)[154]havenotmaterialized.Diminishedproductionofmostresourceshasnotoccurredsofar,onereasonbeingthatadvancementsintechnologyandsciencehaveallowedsomepreviouslyunavailableresourcestobeproduced.[154]Insomecases,substitutionofmoreabundantmaterials,suchasplasticsforcastmetals,loweredgrowthofusageforsomemetals.Inthecaseofthelimitedresourceofland,faminewasrelievedfirstlybytherevolutionintransportationcausedbyrailroadsandsteamships,andlaterbytheGreenRevolutionandchemicalfertilizers,especiallytheHaberprocessforammoniasynthesis.[155][156]
Resourcequalityiscomposedofavarietyoffactorsincludingoregrades,location,altitudeaboveorbelowsealevel,proximitytorailroads,highways,watersupplyandclimate.Thesefactorsaffectthecapitalandoperatingcostofextractingresources.Inthecaseofminerals,lowergradesofmineralresourcesarebeingextracted,requiringhigherinputsofcapitalandenergyforbothextractionandprocessing.Copperoregradeshavedeclinedsignificantlyoverthelastcentury.[157][158]Anotherexampleisnaturalgasfromshaleandotherlowpermeabilityrock,whoseextractionrequiresmuchhigherinputsofenergy,capital,andmaterialsthanconventionalgasinpreviousdecades.Offshoreoilandgashaveexponentiallyincreasedcostaswaterdepthincreases.
SomephysicalscientistslikeSanyamMittalregardcontinuouseconomicgrowthasunsustainable.[159][160]Severalfactorsmayconstraineconomicgrowth–forexample:finite,peaked,ordepletedresources.
In1972,TheLimitstoGrowthstudymodeledlimitationstoinfinitegrowth;originallyridiculed,[152][153][161]someofthepredictedtrendshavematerialized,raisingconcernsofanimpendingcollapseordeclineduetoresourceconstraints.[162][163][164]
MalthusianssuchasWilliamR.Catton,Jr.areskepticaloftechnologicaladvancesthatimproveresourceavailability.Suchadvancesandincreasesinefficiency,theysuggest,merelyacceleratethedrawingdownoffiniteresources.Cattonclaimsthatincreasingratesofresourceextractionare"...stealingravenouslyfromthefuture".[165]
Energy[edit]
FurtherinformationonEnergyroleineconomy:Econodynamics
FurtherinformationonEnergyefficiency:Productivityimprovingtechnologies(historical)§ Energyefficiency
Energyeconomictheoriesholdthatratesofenergyconsumptionandenergyefficiencyarelinkedcausallytoeconomicgrowth.TheGarrettRelationholdsthattherehasbeenafixedrelationshipbetweencurrentratesofglobalenergyconsumptionandthehistoricalaccumulationofworldGDP,independentoftheyearconsidered.Itfollowsthateconomicgrowth,asrepresentedbyGDPgrowth,requireshigherratesofenergyconsumptiongrowth.Seeminglyparadoxically,thesearesustainedthroughincreasesinenergyefficiency.[166]IncreasesinenergyefficiencywereaportionoftheincreaseinTotalfactorproductivity.[14]Someofthemosttechnologicallyimportantinnovationsinhistoryinvolvedincreasesinenergyefficiency.Theseincludethegreatimprovementsinefficiencyofconversionofheattowork,thereuseofheat,thereductioninfrictionandthetransmissionofpower,especiallythroughelectrification.[167][168]Thereisastrongcorrelationbetweenpercapitaelectricityconsumptionandeconomicdevelopment.[169][170]
Possibilityofinfiniteeconomicgrowth[edit]
Theeconomicsystemasasubsystemoftheenvironment:naturalresourcesflowthroughtheeconomyandendupaswasteandpollution
Ecologicaleconomicscriticizesthepossibilityofinfiniteeconomicgrowth.Currenteconomicmodelssuggesttheeconomycangrowcontinuouslyasaperpetualmotionmachine.However,accordingtotheLawsofThermodynamicsperpetualmotionmachinesdonotexist.[171]TheFirstLawssaysmatterandenergycannotbecreatedordestroyed,andtheSecondLawssaysthatmatterandenergymovefromalowentropy,useful,statetowardsalessusefulhigherentropystate.[172]Thus,nosystemcancontinuewithoutinputsofnewenergythatexitashighentropywaste.Justasnoanimalcanliveonitsownwaste,noeconomycanrecyclethewasteitproduceswithouttheinputofnewenergytoreproduceitself.[171]
Matterandenergyentertheeconomyintheformoflowentropynaturalcapital,suchassolarenergy,oilwells,fisheries,andmines.Thesematerialsandenergyareusedbyhouseholdsandfirmsaliketocreateproductsandwealth.Afterthematerialareusedup,theenergyandmatterleavestheeconomyintheformofhighentropywastethatisnolongervaluabletotheeconomy.Thenaturalmaterialsthatpowerthemotionoftheeconomicsystemfromtheenvironment,andthewastemustbeabsorbedbythelargerecosysteminwhichtheeconomyexists.[173]
Itcannotbeignoredthattheeconomyintrinsicallyrequiresnaturalresourcesandthecreationofwastethatmustbeabsorbedinsomemanner.Theeconomycanonlycontinuechurningifithasmatterandenergytopoweritandtheabilitytoabsorbthewasteitcreates.Thismatterandlowentropyenergyandtheabilitytoabsorbwasteexistsinafiniteamount,andthusthereisafiniteamountofinputstotheflowandoutputsoftheflowthattheenvironmentcanhandle,implyingthereisasustainablelimittomotion,andthereforegrowth,oftheeconomy.[171]
EconomicGrowthonanExample:Armenia[edit]
Let'sconsiderArmeniaasanexampletoexamineeconomicfluctuationsandgrowth.ArmeniagotitsindependencefromUSSRintheyear1991.TheGDPpercapitaofthecountrywasonly590$.[174]AsArmeniawasatwarwithneighbouringAzerbaijanuntil1994,theeconomicsituationinthecountrywasnotimproving.In1994,GDPpercapitawas400$.Thesituationgotmuchbetterafterwards.Abigrapideconomicgrowthoccurredinthecountryinthe2000sduetoaboominconstruction.GDPpercapitareached4010$in2008.Duetothegreatrecession,thevalueofGDPpercapitadeclinedintheyear2009butcontinuedrisingafterwards.ThefinaldeclineinGDPpercapitawasseenin2020whichwasresultedfromtheCOVID-19pandemicandthesecondArtsakhwar.Currently,theGDPpercapitaofthecountryis4267$.
Seealso[edit]
Americanexceptionalism
Civilizingmission
Climatechange
Critiqueofpoliticaleconomy
Degrowth
Developmenttheory
Economicdevelopment
Export-orientedindustrialization
Greed
Greengrowth
Greennewdeal
Growthaccounting
TheLimitstoGrowth
ListofcountriesbyrealGDPgrowthrate
Manifestdestiny
OrthodoxDevelopment
Post-growth
Productivism
Progress
Propaganda
ProsperityWithoutGrowth
Statusquo
Sufficiencyeconomy
Sustainability
Sustainabledevelopment
Uneconomicgrowth
Unifiedgrowththeory
Universalbasicincome
Wealthredistribution
TheWhiteMan'sBurden
Worldview
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