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World Bank classification: India is still a lower-middle-income nation, while Sri Lanka grows richer
Least-Developed Countries (LDC) Definition
lower-middle income countries - List of Frontiers' open access articles
New country classifications by income level: 2019-2020
Despite Poverty's Plunge, Middle-Class Status Remains Out of Reach for Many | Pew Research Center
LIS Cross-National Data Center in Luxembourg
2 (iii): List of Upper Middle Income Countries | Download Table
High Income Country Population | NextBigFuture.com
List of all low-income countries | Download Table
What do the World Bank's country classifications mean? | World Economic Forum
New World Bank country classifications by income level: 2020-2021
Middle class - Wikipedia
Developed and Developing Countries: World Bank Classification | Economics
World Bank: World Bank to change classification of countries; India will now be called 'lower-middle income' - The Economic Times
World Bank: Georgia moves from lower-middle to upper-middle income country
Chart: Very Few Countries Have Been Able to Escape the 'Middle Income Trap'
PLOS ONE: Magnitude of Treatment Abandonment in Childhood Cancer
Aine on Twitter: "While Uganda was not listed for Covid relief by IMF - it apparently is a low income country. Cameroon, Zambia & Ghana make the list of middle Income status
Covid World Vaccination Tracker - The New York Times
List of countries by GNI (nominal) per capita - Wikipedia
List of countries included in the sample by income classification. | Download Table
New World Bank country classifications by income level: 2020-2021
The fight to manufacture COVID vaccines in lower-income countries
Mapping the Global Population: How Many Live on How Much, and Where | Pew Research Center
Aiming for the Top: Can China Escape the Middle Income Trap? - CKGSB