Economics & Finance / Macroeconomics / International Trade & Globalization

Why Big Importers Don't Buy More From Each Supplier (Colombia's Trade Secret)

Andrew B. Bernard; Esther A. Bøler; Swati Dhingra

Think you know how global trade works? Think again. This video dives into a groundbreaking 2018 study by economists Andrew B. Bernard, Esther A. Bøler, and Swati Dhingra, using 20 years of Colombian import data to reveal the hidden rules of firm-to-firm connections. The shocking truth: big importers aren't big because they buy more from each supplier—they're big because they have more suppliers. And the network of trade is full of surprises: most trade relationships die within a year, but the ones that survive explode in value. We break down the 'negative degree assortativity'—why the most connected exporters often sell to the least connected importers, and what that means for small businesses trying to enter global markets. If you're into economics, business strategy, or just want to understand how the world really moves goods, this is for you.