Demographic-macroeconomic laws don't actually exist. the results of major studies change depending on which countries you look at.
April 24, 2026
Original Paper
Sample Composition Fragility in Demographic-Macro Research: A Diagnostic Framework
SSRN · 6602698
The Takeaway
Contradictory findings in demographic research are often the result of sample composition rather than bad data or flawed logic. The effect of an aging population on capital flows and national wealth varies wildly based on a country's income level and legal regime. Most major studies claim to have found universal rules, but their conclusions would flip if a different set of nations were included. This diagnostic framework shows that demographics do not follow a single path across the globe. Researchers must stop looking for one-size-fits-all answers and start accounting for the unique institutional backgrounds of every country.
From the abstract
Demographic variables are widely used in crosscountry panel regressions to explain capital flows, interest rates, exchange rate regimes, and fiscal dynamics. Yet the literature reports strikingly contradictory findings: demographic effects on the current account are positive in some studies, negative in others, and null in several OECD-focused panels. We show that these contradictions are the expected consequence of a multi-dimensional coefficient surface. Using a 141-country panel covering 97%