A high-income economy is defined by the World Bank as a country with a gross national income per capita of US13,845ormorein2022,calculatedusingtheAtlasmethod.Whiletheterm"high−income"isoftenusedinterchangeablywith"FirstWorld"and"developedcountry,"thetechnicaldefinitionsofthesetermsdiffer.Theterm"firstworld"commonlyreferstocountriesthatalignedthemselveswiththeU.S.andNATOduringtheColdWar.Severalinstitutions,suchastheCentralIntelligenceAgency(CIA)orInternationalMonetaryFund(IMF),takefactorsotherthanhighpercapitaincomeintoaccountwhenclassifyingcountriesas"developed"or"advancedeconomies."AccordingtotheUnitedNations,forexample,somehigh−incomecountriesmayalsobedevelopingcountries.TheGCCcountries,forexample,areclassifiedasdevelopinghigh−incomecountries.Thus,ahigh−incomecountrymaybeclassifiedaseitherdevelopedordeveloping.AlthoughVaticanCityisasovereignstate,itisnotclassifiedbytheWorldBankunderthisdefinition.AccordingtotheWorldBankthefollowing83countries(includingterritories)areclassifiedas"high−incomeeconomies."Inbracketsaretheyear(s)duringwhichtheyheldsuchclassification;classifyingbeganin1987.Asofthe2024fiscalyear,high−incomeeconomiesarethosethathadaGNIpercapitaof13,845 or more in 2022.