Myrdal — Demography & Migration
Population is not a backdrop to the economy. Age structure sets who can work and who must be supported; migration moves labour and demand between places; fertility and mortality decide both, decades in advance. Myrdal assembles 62 demographic series — 1,149,344 observations — from named public statistical sources, so those forces can be read directly rather than assumed.
Explore →
56 of the 62 series can be charted directly in the browser, across 7 source families — world population, the demographic transition, United States counties, and internal migration.
Data →
Every series as CSV, XLSX and Parquet, with a 62-row data dictionary and a per-series provenance record. One bundle for everything.
Methodology →
Where each number comes from, how far it really runs, and what is missing — including the two series that are registered but empty.
What is here
Four bodies of evidence, kept separate because they answer different questions.
- The long run. World and country population from year 1 CE to 2024, stitched from the Maddison Project and Clio-Infra before 1960 and the World Bank's World Development Indicators after it — the seam is recorded in a
sourcecolumn inside the file itself, not hidden in a footnote. - The transition. Fertility, crude birth and death rates, life expectancy, under-five mortality and the youth and old-age dependency ratios, by country, on World Development Indicators.
- United States counties. Population, median age, race and ethnicity, nativity, income, labour force and housing for 3,231 counties on the American Community Survey five-year estimates, plus the Population Estimates Program age bands.
- Who moved. County-to-county and state net migration from Internal Revenue Service Statistics of Income filings, which key on a filing-year pair — a flow spans two years and is labelled that way here.
Three things the data says
- World population reached 8.14 billion in 2024 on the World Bank's own world aggregate, and 8.12 billion when the individual countries are summed — the two differ, and both are in the file (
D001). - 13.6 % of the United States population was foreign-born in 2022, and the state figure ranges from 26.5 % in California to 1.6 % in West Virginia (
D049, 52 state-level rows including the District of Columbia and Puerto Rico). - Summed across all counties the total dependency ratio is 0.549 and the old-age ratio 0.275 — about 28 people aged 65 or over for every 100 of working age (
D058, Population Estimates Program 2023 vintage).
An Arcanum Research project · Anu Framework v12.2 · every value traces to a published source; no synthetic or estimated data. Named for Gunnar Myrdal.