How Satellite Night-Time Light Data Audits National Accounts, Redefines Sovereign Wealth, and Sparks a Geopolitical Measurement Revolution Satellite night-time light (NTL) data has revolutionized macroeconomics by offering an unmanipulated, outer-space gauge of human productivity. While national statistical agencies compute Gross Domestic Product through complex bureaucratic pipelines, corporate registries, and tax invoices, orbital sensors capture the physical glow of factories, ports, transport networks, and urban sprawl. This article synthesizes the profound structural shifts, academic debates, and mathematical recalibrations brought about by auditing official economic data through space-observed luminosity. Focusing heavily on the landmark research emerging from the Peterson Institute for International Economics, the analysis explores how India, China, and other global powers see their sovereign economic baselines transformed under this physical lens. The narrative balances the...
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