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Sources & Methodology

Last updated: January 29, 2026

Why did I create this website?

It would be a lie to say Measured World is purely a work of love.

Of course, a large part in the process of creating it was supported with my love for data and the ways it can be presented. When I wanted to give up, my personal feelings on the matter pushed me to finish it.

Now that it's mostly done, but constantly changing, I discovered, or maybe even admitted to myself, there are other reasons for it.

First of all, the research tied to the metrics is fascinating. There is an endless well of information from all over the world, and I never get tired of it.

Apart from that, I wanted to carve out a single piece of my own space online where I could potentially talk with people, find and share common interest in data and the ways, not to sound presumptuous, it can affect the world.

Lastly, and I know it's a long shot, I want to create a career out of Measured World, and build so many more features ranging from newsletters, a blog section and many more metric categories.

I'm not a mathematician, or an economist. Just a journalist with some tangential experience in presenting facts and telling stories. Honestly, I got fed up with our industry and hoped a platform such as this could satisfy my need for storytelling, and in the long term, my existential needs.

In any case, I wanted to come clean at the very start. This is a passion project, but with fingers crossed behind my back that it might just pan out into something larger.

Data Sources

United Nations Department of Economic and Social Affairs

Population Division • Demographic Data

The demographic data (population, fertility, mortality, migration) is sourced from the UN World Population Prospects 2024, the authoritative source for global population estimates and projections. This dataset provides comprehensive demographic indicators for all UN member states and other territories from 1950 to 2100.

Visit UN Population Division

License: Creative Commons Attribution 3.0 IGO

International Monetary Fund (IMF)

World Economic Outlook • Economic Data

The economic data is sourced from the IMF World Economic Outlook Database (October 2025). This includes GDP, inflation, unemployment, government finances, and external balances for IMF member countries from 1980 to 2030 (including IMF staff projections for future years).

Visit IMF World Economic Outlook

License: IMF Terms of Use

UNESCO Institute for Statistics (UIS)

SDG 4 Education Indicators • Education Data

The education data is sourced from the UNESCO Institute for Statistics SDG 4 Education Database. This includes literacy rates, school enrollment, completion rates, teacher quality metrics, educational attainment, and government spending on education for countries worldwide from 1970 to 2025.

Visit UNESCO Institute for Statistics

License: Creative Commons Attribution-ShareAlike 3.0 IGO

Data Categories

The data is organized into seven main categories, each containing multiple indicators:

Population

Total population, population growth rate, population density, sex ratio, median age, and demographic structure breakdowns by age and gender.

Age Structure

Population broken down by age group and gender, from children to the elderly.

Fertility

Total fertility rate, crude birth rate, births by maternal age group, net reproduction rate, and mean age at childbearing.

Mortality

Life expectancy at birth and various ages, infant mortality rate, under-five mortality, crude death rate, and age-specific mortality probabilities.

Migration

Net migration rate, net number of migrants, and international migration flows.

Economy

GDP (nominal and PPP), GDP per capita, GDP growth rate, inflation rate, unemployment rate, government debt, revenue, expenditure, fiscal balance, and current account balance.

Education

Literacy rates (adult, youth, elderly), school enrollment and completion rates, out-of-school rates, educational attainment levels, pupil-teacher ratios, teacher qualifications, and government education spending as percentage of GDP and government budget.

Data Coverage

Countries & Territories237
Total Indicators100+

Demographic Data (UN)

Historical1950–2024
Projections2025–2100

Economic Data (IMF)

Historical1980–2024
Projections2025–2030

Education Data (UNESCO)

Coverage1970–2025
Indicators39

Note: Data availability varies by country and indicator. Some territories may have limited data for certain years or metrics. Economic data coverage is typically more limited for smaller territories.

Methodology

Data Processing

The raw data is processed to ensure consistency and accuracy. This includes standardizing country names and codes (ISO 3166), validating data ranges, and computing derived metrics where applicable.

Trend Calculations

Year-over-year (YoY) and 5-year trends are calculated as percentage changes between comparable periods. These help identify demographic shifts and patterns over time.

Regional Groupings

Countries are organized according to the UN M49 Standard for geographic regions. This includes 6 continental regions and their subregions.

Aggregate Statistics

Regional and global aggregates are calculated using appropriate methods: sums for absolute values (population, births, deaths), weighted averages for rates and ratios, with population as the typical weighting factor.

Limitations & Disclaimers

Estimates vs. Counts: Much of the demographic data represents statistical estimates rather than exact counts. The UN uses sophisticated demographic models and available census/survey data to produce these estimates.

Projections: Future data (2025–2100) represents medium-variant projections based on assumed trends in fertility, mortality, and migration. Actual outcomes may differ significantly.

Data Gaps: Some countries have limited vital registration systems, leading to greater uncertainty in their demographic estimates.

Not Official Statistics: This portal is for informational and educational purposes. For official statistics, please consult the original UN data sources or national statistical offices.

Update Frequency

Demographic data: Updated when new UN World Population Prospects revisions are released, typically every two years. Current data is based on the 2024 Revision.

Economic data: Updated when new IMF World Economic Outlook releases are available, typically twice per year (April and October). Current data is based on the October 2025 release.

Education data: Updated when new UNESCO Institute for Statistics releases are available. UNESCO continuously updates their database as countries report new data.

Bug fixes and improvements happen whenever I can find the time.

Get in Touch

Found a bug? Have a feature idea? Just want to say hi? I'd love to hear from you. Drop me a line at [email protected] or connect on social media.