Sources and data coverage
This page separates checked reference resources from evidence for the numbers on NationAnalytics. A publisher offering a similar indicator does not prove where our existing value came from.
Sources matched to current values
Fifteen observations are reconciled: population, GDP and GDP per capita for United States, Canada, Australia, Germany and Sri Lanka, all for 2025. Each of those country profiles cites the exact World Bank observation. No other metric or country inherits that citation. Canada and Sri Lanka population figures are marked preliminary.
Population, GDP and GDP per capita pilot: United States, Canada, Australia, Germany and Sri Lanka, common reference year 2025. Other countries and metrics remain source unknown; all-country ordering is not a same-year comparison. All three are direct publisher observations; GDP per capita is not calculated locally. Sources and qualifications.
Reference resources by topic
The World Bank entries support only the fifteen individually cited pilot observations. The OECD entry remains methodology-only. No entry establishes the provenance of every value on the site.
Population · Primary source checked — value citations require separate matched evidence
World Bank: World Development Indicators — Population, total
Only the five cited 2025 population values are reconciled. Canada and Sri Lanka are marked Preliminary. Other populations and all other fields retain their own provenance status.
Coverage: Value-level coverage: United States, Canada, Australia, Germany and Sri Lanka, population in 2025 only.
2025 for the five-country pilot; series metadata spans 1960–2025, without uniform coverage claims. Update cadence: not verified on the checked page.
Indicator page lists CC BY 4.0; check applicable attribution and upstream conditions before reuse.
Open the official World Bank resourceResource page checked: . This is not the update date of our country data.
Economy · Primary source checked — value citations require separate matched evidence
World Bank: World Development Indicators — GDP (current US$)
Only the five cited 2025 GDP observations are reconciled. This does not source GDP per capita, other countries, constant-price or PPP values. No World Bank endorsement is implied.
Coverage: Value-level coverage: United States, Canada, Australia, Germany and Sri Lanka, GDP in 2025 only.
2025 for the five-country pilot; series metadata spans 1960–2025, without uniform coverage claims. Update cadence: not verified on the checked page.
Indicator page lists CC BY 4.0; check applicable attribution and upstream conditions before reuse.
Open the official World Bank resourceResource page checked: . This is not the update date of our country data.
Salary definitions · Methodology explanation only
OECD: Average annual wages — indicator explanation
Used only to illustrate why salary definitions matter. NationAnalytics legacy salaries have not been matched to this series; they must not inherit its methodology, price basis or coverage.
Coverage: Publisher-covered economies only; no claim of coverage of all 197 NationAnalytics records.
The checked explanation expresses results in 2025 prices; this is a price basis, not a reference year for NationAnalytics salaries. Update cadence: not verified on the checked page.
Reuse terms were not verified; check the publisher before reproducing data.
Open the official OECD resourceResource page checked: . This is not the update date of our country data.
GDP per capita · Primary source checked — value citations require separate matched evidence
World Bank: World Development Indicators — GDP per capita (current US$)
No coverage claim for other countries or other metrics. Direct indicator copied; no local GDP/population substitution. Footnotes not requested in minimal API calls; revisions remain possible.
Coverage: Five pilot economies only: United States, Canada, Australia, Germany and Sri Lanka; 2025.
2025 for five matched observations Update cadence: not verified on the checked page.
CC BY-4.0 in official indicator/series metadata; attribution to World Bank and its data providers, subject to dataset terms.
Open the official World Bank resourceResource page checked: . This is not the update date of our country data.
Attribution: The World Bank: World Development Indicators; population providers include UN Population Division, national statistical offices, Eurostat and UN Statistics Division; GDP providers include national statistical offices/central banks, OECD national accounts and World Bank staff estimates. Series metadata identifies CC BY-4.0. See World Bank dataset terms, attribution requirements and exceptions. No endorsement is implied. Checked on 2026-10-12; observations may subsequently be revised.
What remains unknown
Costs, tax assumptions, salary definitions, comparative indices, safety, healthcare, education, migration information, university ranks and qualitative descriptions still need value-level evidence. Population, GDP and GDP per capita outside the five-country pilot remain unmatched. A familiar institution name is not a substitute for that evidence.
Read our Methodology for calculation assumptions and missing-data handling. To suggest a correction, use Contact with the page, metric, official source and reference period.