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To describe international trade flows, we propose the coulomb forceformulation, in which the magnitude of the charge represents gross domesticproduct (GDP) and the distance between countries is the bilateral distance, theproduct of spatial distance and "dielectric constant," rather than the spatialdistance as used in the gravitation model, allowing it to be time dependent.The "dielectric constant" is influenced by factors such as warfare,transportation disruptions, trade agreements, social, geography, politics,culture, and others. The GDP and distance power parameters were estimated usingdata from high-GDP countries' export-import transactions. We also developed atrade strength distribution equation that fits World Bank data reasonably wellover a decade.

Coulomb-like Model for International Trade Flow and Derivation of Distribution Function for Trade Flow Strength