ational economicsApplied economicsMathematical economicsEconometricsJEL classification codesසංකල්පසිද්ධාන්තශිල්ප ක්‍රමEconomic systemsEconomic growthMarketNational accountingExperimental economicsComputational economicsGame theoryOperations researchBy applicationAgriculturalBehavioralBusinessCulturalDemographicDevelopmentDigitizationEcologicalEducationEngineeringEnvironmentalEvolutionaryExpeditionaryEconomic geographyFinancialHealthEconomic historyIndustrial organizationInformationInstitutionalKnowledgeLabourLawManagerialMonetaryNatural resourceOrganizationalPersonnelEconomic planningEconomic policyPublic economicsPublic / Social choiceRegionalRuralServiceSocioeconomicsEconomic sociologyEconomic statisticsUrbanWelfareWelfare economicsNotable economistsFrançois QuesnayAdam SmithDavid RicardoThomas Robert MalthusJohn Stuart MillKarl MarxWilliam Stanley JevonsLéon WalrasAlfred MarshallIrving FisherJohn Maynard Key