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1. ### [Country Classification →](/knowledgebase/topics/19280-country-classification)
1. [World Bank Country and Lending Groups](/knowledgebase/articles/906519-world-bank-country-and-lending-groups)
2. [How does the World Bank classify countries?](/knowledgebase/articles/378834-how-does-the-world-bank-classify-countries)
3. [How are the income group thresholds updated?](/knowledgebase/articles/378833-how-are-the-income-group-thresholds-updated)
4. [Why use GNI per capita to classify economies into income groupings?](/knowledgebase/articles/378831-why-use-gni-per-capita-to-classify-economies-into)
2. ### [Currencies →](/knowledgebase/topics/19371-currencies)
1. [What are the conversion rates from European Monetary Union (EMU) currencies to Euros?](/knowledgebase/articles/114964-what-are-the-conversion-rates-from-european-moneta)
2. [What is an “international dollar”?](/knowledgebase/articles/114944-what-is-an-international-dollar)
3. [How do you derive constant price series in USD?](/knowledgebase/articles/114943-how-do-you-derive-constant-price-series-in-usd)
3. ### [Data Compilation Methodology →](/knowledgebase/topics/19373-data-compilation-methodology)
1. [Methodologies](/knowledgebase/articles/906531-methodologies)
2. [How are aggregate growth rates computed for National Accounts series?](/knowledgebase/articles/114952-how-are-aggregate-growth-rates-computed-for-nation)
3. [What is the SDR deflator?](/knowledgebase/articles/378829-what-is-the-sdr-deflator)
4. [How do you derive your constant price series for the national accounts?](/knowledgebase/articles/114968-how-do-you-derive-your-constant-price-series-for-t)
5. [How can I rescale a series to a different base year?](/knowledgebase/articles/114946-how-can-i-rescale-a-series-to-a-different-base-yea)
[12 articles →](/knowledgebase/topics/19373-data-compilation-methodology "View all articles in Data Compilation Methodology")
4. ### [Data Not Available →](/knowledgebase/topics/19285-data-not-available)
1. [Why are some data not available?](/knowledgebase/articles/191133-why-are-some-data-not-available)
2. [Do you have global income distribution data?](/knowledgebase/articles/114953-do-you-have-global-income-distribution-data)
3. [Do you have any data on wealth?](/knowledgebase/articles/114937-do-you-have-any-data-on-wealth)
4. [Do you have data for informal sectors?](/knowledgebase/articles/114951-do-you-have-data-for-informal-sectors)
5. [Why is there no poverty data for every country every year?](/knowledgebase/articles/114960-why-is-there-no-poverty-data-for-every-country-eve)
[7 articles →](/knowledgebase/topics/19285-data-not-available "View all articles in Data Not Available")
5. ### [Data Updates →](/knowledgebase/topics/19282-data-updates)
1. [Data Updates and Errata](/knowledgebase/articles/906522-data-updates-and-errata)
2. [Do you have more recent data than I currently find on your website?](/knowledgebase/articles/114938-do-you-have-more-recent-data-than-i-currently-find)
3. [Do you have quarterly, monthly or higher frequency data?](/knowledgebase/articles/77928-do-you-have-quarterly-monthly-or-higher-frequency)
6. ### [DataBank →](/knowledgebase/topics/19283-databank)
1. [How do I start in DataBank?](/knowledgebase/articles/193416-how-do-i-start-in-databank)
2. [How do I select countries in DataBank?](/knowledgebase/articles/193418-how-do-i-select-countries-in-databank)
3. [How do I view country and Indicator notes/metadata in DataBank?](/knowledgebase/articles/193419-how-do-i-view-country-and-indicator-notes-metadata)
4. [How do I select indicators in DataBank?](/knowledgebase/articles/193421-how-do-i-select-indicators-in-databank)
5. [How do I edit the list of Countries, Indicators and Years I have selected in DataBank?](/knowledgebase/articles/193422-how-do-i-edit-the-list-of-countries-indicators-an)
[13 articles →](/knowledgebase/topics/19283-databank "View all articles in DataBank")
7. ### [Developer Information →](/knowledgebase/topics/125589-developer-information)
1. [Developer Information: Overview](/knowledgebase/articles/889386-developer-information-overview)
2. [About the Indicators API Documentation](/knowledgebase/articles/889392-about-the-indicators-api-documentation)
3. [New Features and Enhancements in the V2 API](/knowledgebase/articles/1886674-new-features-and-enhancements-in-the-v2-api)
4. [API Basic Call Structures](/knowledgebase/articles/898581-api-basic-call-structures)
5. [Country API Queries](/knowledgebase/articles/898590-country-api-queries)
[15 articles →](/knowledgebase/topics/125589-developer-information "View all articles in Developer Information")
8. ### [External Debt →](/knowledgebase/topics/19287-external-debt)
1. [What is External Debt?](/knowledgebase/articles/474124-what-is-external-debt)
2. [What is the External Debtor Reporting System (DRS)?](/knowledgebase/articles/381934-what-is-the-external-debtor-reporting-system-drs)
3. [What are Stock Figures?](/knowledgebase/articles/474126-what-are-stock-figures)
4. [What is Net Flow?](/knowledgebase/articles/474127-what-is-net-flow)
5. [What is the difference between "External debt stocks" and "Gross External Debt Position"?](/knowledgebase/articles/826488-what-is-the-difference-between-external-debt-stoc)
9. ### [Finance/Lending →](/knowledgebase/topics/20192-finance-lending)
1. [Do you have data on World Bank interest rates by country?](/knowledgebase/articles/114965-do-you-have-data-on-world-bank-interest-rates-by-c)
10. ### [Foreign Direct Investment (FDI) →](/knowledgebase/topics/19377-foreign-direct-investment-fdi)
1. [What is the difference between Foreign Direct Investment (FDI) net inflows and net outflows?](/knowledgebase/articles/114954-what-is-the-difference-between-foreign-direct-inve)
2. [Is foreign direct investment (FDI) included in gross fixed capital formation?](/knowledgebase/articles/195312-is-foreign-direct-investment-fdi-included-in-gro)
11. ### [Gender Data Portal →](/knowledgebase/topics/151279-gender-data-portal)
1. [How can I download data from the Gender Data Portal?](/knowledgebase/articles/1986166-how-can-i-download-data-from-the-gender-data-porta)
2. [Why are some data not available?](/knowledgebase/articles/1986136-why-are-some-data-not-available)
3. [How do you use the Gender Gap in the Map view?](/knowledgebase/articles/1986139-how-do-you-use-the-gender-gap-in-the-map-view)
4. [How can I learn more about a specific indicator?](/knowledgebase/articles/1986142-how-can-i-learn-more-about-a-specific-indicator)
5. [Why are some indicators disaggregated whereas others are not?](/knowledgebase/articles/1986145-why-are-some-indicators-disaggregated-whereas-othe)
[11 articles →](/knowledgebase/topics/151279-gender-data-portal "View all articles in Gender Data Portal")
12. ### [Gross Domestic Product (GDP)/Gross National Income (GNI) →](/knowledgebase/topics/19375-gross-domestic-product-gdp-gross-national-income)
1. [Do you have Gross Domestic Product (GDP) and Gross National Income (GNI) forecasts?](/knowledgebase/articles/77932-do-you-have-gross-domestic-product-gdp-and-gross)
2. [What is the difference between total value added and gross domestic product?](/knowledgebase/articles/114948-what-is-the-difference-between-total-value-added-a)
3. [Why do countries revise their national accounts?](/knowledgebase/articles/680284-why-do-countries-revise-their-national-accounts)
4. [What is the difference between current and constant price series?](/knowledgebase/articles/114942-what-is-the-difference-between-current-and-constan)
13. ### [ICP/PPPs →](/knowledgebase/topics/71785-icp-ppps)
1. [How do you extrapolate the PPP conversion factors estimated by the ICP?](/knowledgebase/articles/665452-how-do-you-extrapolate-the-ppp-conversion-factors)
14. ### [International Comparison Program (ICP) →](/knowledgebase/topics/19292-international-comparison-program-icp)
1. [Why are some series shown in Purchasing Power Parity (PPP) terms?](/knowledgebase/articles/114945-why-are-some-series-shown-in-purchasing-power-pari)
2. [What is the difference between purchaser prices, producer prices (VAP), and basic prices (VAB)?](/knowledgebase/articles/114947-what-is-the-difference-between-purchaser-prices-p)
15. ### [Microdata →](/knowledgebase/topics/38788-microdata)
1. [What do we mean by microdata?](/knowledgebase/articles/228873-what-do-we-mean-by-microdata)
2. [How can I contribute to improving the Microdata Library?](/knowledgebase/articles/235632-how-can-i-contribute-to-improving-the-microdata-li)
3. [I need a dataset which is not listed in your microdata catalog, but which has been used in World Bank publications. Can you help me obtain these data?](/knowledgebase/articles/235634-i-need-a-dataset-which-is-not-listed-in-your-micro)
4. [What are the research outputs associated with a dataset in your Library? Do you have a bibliography of data-related citations?](/knowledgebase/articles/235635-what-are-the-research-outputs-associated-with-a-da)
5. [Can you help with analyzing microdata?](/knowledgebase/articles/235636-can-you-help-with-analyzing-microdata)
[15 articles →](/knowledgebase/topics/38788-microdata "View all articles in Microdata")
16. ### [Open Data Training →](/knowledgebase/topics/124557-open-data-training)
1. [Open Data Training Modules](/knowledgebase/articles/889374-open-data-training-modules)
17. ### [Other →](/knowledgebase/topics/19304-other)
1. [How does the World Bank code its indicators?](/knowledgebase/articles/201175-how-does-the-world-bank-code-its-indicators)
2. [How can I keep up to date with updates, additions, and revisions?](/knowledgebase/articles/114940-how-can-i-keep-up-to-date-with-updates-additions)
3. [What are emerging markets?](/knowledgebase/articles/114958-what-are-emerging-markets)
4. [What is the difference between trade indicators derived from the Balance of Payments and trade data from COMTRADE?](/knowledgebase/articles/797676-what-is-the-difference-between-trade-indicators-de)
18. ### [Poverty Data →](/knowledgebase/topics/21164-poverty-data)
1. [Why did the World Bank decide to update the International Poverty Line?](/knowledgebase/articles/746109-why-did-the-world-bank-decide-to-update-the-intern)
2. [What is the $2.15 poverty line, and based on this new measure, how many people are living in extreme poverty in the world?](/knowledgebase/articles/746163-what-is-the-2-15-poverty-line-and-based-on-this)
3. [How is the international poverty line derived? How is it different from national poverty lines?](/knowledgebase/articles/193310-how-is-the-international-poverty-line-derived-how)
4. [Should I use national or global poverty lines?](/knowledgebase/articles/193309-should-i-use-national-or-global-poverty-lines)
5. [Why raise the poverty line to $2.15 a day? What was wrong with the $1.90 a day line that we are used to?](/knowledgebase/articles/746172-why-raise-the-poverty-line-to-2-15-a-day-what-wa)
[10 articles →](/knowledgebase/topics/21164-poverty-data "View all articles in Poverty Data")
19. ### [Private Sector (IFC) →](/knowledgebase/topics/19378-private-sector-ifc)
1. [Where can I find data on the private sector and privatization?](/knowledgebase/articles/114961-where-can-i-find-data-on-the-private-sector-and-pr)
20. ### [Quarterly External Debt Statistics (QEDS) →](/knowledgebase/topics/19358-quarterly-external-debt-statistics-qeds)
1. [Do you have quarterly external debt data?](/knowledgebase/articles/77929-do-you-have-quarterly-external-debt-data)
2. [How often is the Quarterly External Debt Data Updated?](/knowledgebase/articles/310912-how-often-is-the-quarterly-external-debt-data-upda)
3. [Which countries have reported data to Quarterly External Debt Statistics (GDDS) ?](/knowledgebase/articles/311787-which-countries-have-reported-data-to-quarterly-ex)
4. [Which countries subscribe to Quarterly External Debt Statistics (QEDS) SDDS?](/knowledgebase/articles/311827-which-countries-subscribe-to-quarterly-external-de)
5. [Which countries subscribe to Quarterly External Debt Statistics (QEDS) GDDS?](/knowledgebase/articles/311834-which-countries-subscribe-to-quarterly-external-de)
[6 articles →](/knowledgebase/topics/19358-quarterly-external-debt-statistics-qeds "View all articles in Quarterly External Debt Statistics (QEDS)")
21. ### [Quarterly Public Sector Debt →](/knowledgebase/topics/49089-quarterly-public-sector-debt)
1. [Which countries have reported data to Quarterly Public Sector Debt database?](/knowledgebase/articles/311566-which-countries-have-reported-data-to-quarterly-pu)
2. [How often is the Quarterly Public Sector Debt data updated?](/knowledgebase/articles/311017-how-often-is-the-quarterly-public-sector-debt-data)
22. ### [Subnational Data →](/knowledgebase/topics/118461-subnational-data)
1. [What is the Subnational Population Database?](/knowledgebase/articles/843492-what-is-the-subnational-population-database)
2. [What are the sources for the subnational population data?](/knowledgebase/articles/843498-what-are-the-sources-for-the-subnational-populatio)
3. [What is the estimation period for the Subnational Population Database?](/knowledgebase/articles/843501-what-is-the-estimation-period-for-the-subnational)
4. [What are the methodologies used in estimating the subnational population data?](/knowledgebase/articles/843507-what-are-the-methodologies-used-in-estimating-the)
5. [How are the first-level administrative division used in the Subnational Population Database?](/knowledgebase/articles/843510-how-are-the-first-level-administrative-division-us)
[6 articles →](/knowledgebase/topics/118461-subnational-data "View all articles in Subnational Data")
23. ### [World Development Indicators (WDI) →](/knowledgebase/topics/19286-world-development-indicators-wdi)
1. [How do I access World Development Indicators (WDI) online tables?](/knowledgebase/articles/191128-how-do-i-access-world-development-indicators-wdi)
2. [Do you have data on population projections?](/knowledgebase/articles/114931-do-you-have-data-on-population-projections)
3. [Where can I find data on literacy rates for high-income countries?](/knowledgebase/articles/114963-where-can-i-find-data-on-literacy-rates-for-high-i)
4. [How can gross school enrollment ratios be over 100 percent?](/knowledgebase/articles/114955-how-can-gross-school-enrollment-ratios-be-over-100)
5. [How do you define remittances?](/knowledgebase/articles/114950-how-do-you-define-remittances)
[10 articles →](/knowledgebase/topics/19286-world-development-indicators-wdi "View all articles in World Development Indicators (WDI)")
24. ### [World Development Report (WDR) →](/knowledgebase/topics/19303-world-development-report-wdr)
1. [Where can I find the data annex tables of the World Development Report?](/knowledgebase/articles/114936-where-can-i-find-the-data-annex-tables-of-the-worl)
25. ### [All articles →](/knowledgebase/articles/all)
1. [Do you have quarterly external debt data?](/knowledgebase/articles/77929-do-you-have-quarterly-external-debt-data)
2. [Do you have Gross Domestic Product (GDP) and Gross National Income (GNI) forecasts?](/knowledgebase/articles/77932-do-you-have-gross-domestic-product-gdp-and-gross)
3. [Where can I find the data annex tables of the World Development Report?](/knowledgebase/articles/114936-where-can-i-find-the-data-annex-tables-of-the-worl)
4. [Why are some series shown in Purchasing Power Parity (PPP) terms?](/knowledgebase/articles/114945-why-are-some-series-shown-in-purchasing-power-pari)
5. [What is the difference between Foreign Direct Investment (FDI) net inflows and net outflows?](/knowledgebase/articles/114954-what-is-the-difference-between-foreign-direct-inve)
[141 articles →](/knowledgebase/articles/all "View all articles")
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* [Country Classification](/knowledgebase/topics/19280-country-classification "View all articles in Country Classification")4 articles
* [Currencies](/knowledgebase/topics/19371-currencies "View all articles in Currencies")3 articles
* [Data Compilation Methodology](/knowledgebase/topics/19373-data-compilation-methodology "View all articles in Data Compilation Methodology")12 articles
* [Data Not Available](/knowledgebase/topics/19285-data-not-available "View all articles in Data Not Available")7 articles
* [Data Updates](/knowledgebase/topics/19282-data-updates "View all articles in Data Updates")3 articles
* [DataBank](/knowledgebase/topics/19283-databank "View all articles in DataBank")13 articles
* [Developer Information](/knowledgebase/topics/125589-developer-information "View all articles in Developer Information")15 articles
* [External Debt](/knowledgebase/topics/19287-external-debt "View all articles in External Debt")5 articles
* [Finance/Lending](/knowledgebase/topics/20192-finance-lending "View all articles in Finance/Lending")1 article
* [Foreign Direct Investment (FDI)](/knowledgebase/topics/19377-foreign-direct-investment-fdi "View all articles in Foreign Direct Investment (FDI)")2 articles
* [Gender Data Portal](/knowledgebase/topics/151279-gender-data-portal "View all articles in Gender Data Portal")11 articles
* [Gross Domestic Product (GDP)/Gross National Income (GNI)](/knowledgebase/topics/19375-gross-domestic-product-gdp-gross-national-income "View all articles in Gross Domestic Product (GDP)/Gross National Income (GNI)")4 articles
* [ICP/PPPs](/knowledgebase/topics/71785-icp-ppps "View all articles in ICP/PPPs")1 article
* [International Comparison Program (ICP)](/knowledgebase/topics/19292-international-comparison-program-icp "View all articles in International Comparison Program (ICP)")2 articles
* [Microdata](/knowledgebase/topics/38788-microdata "View all articles in Microdata")15 articles
* [Open Data Training](/knowledgebase/topics/124557-open-data-training "View all articles in Open Data Training ") 1 article
* [Other](/knowledgebase/topics/19304-other "View all articles in Other")4 articles
* [Poverty Data](/knowledgebase/topics/21164-poverty-data "View all articles in Poverty Data")10 articles
* [Private Sector (IFC)](/knowledgebase/topics/19378-private-sector-ifc "View all articles in Private Sector (IFC)")1 article
* [Quarterly External Debt Statistics (QEDS)](/knowledgebase/topics/19358-quarterly-external-debt-statistics-qeds "View all articles in Quarterly External Debt Statistics (QEDS)")6 articles
* [Quarterly Public Sector Debt](/knowledgebase/topics/49089-quarterly-public-sector-debt "View all articles in Quarterly Public Sector Debt")2 articles
* [Subnational Data](/knowledgebase/topics/118461-subnational-data "View all articles in Subnational Data")6 articles
* [World Development Indicators (WDI)](/knowledgebase/topics/19286-world-development-indicators-wdi "View all articles in World Development Indicators (WDI)")10 articles
* [World Development Report (WDR)](/knowledgebase/topics/19303-world-development-report-wdr "View all articles in World Development Report (WDR)")1 article
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