Commodity Chains and Economies of Scale

A commodity chain starts wherever a raw material is produced, a cotton field, a cacao farm, a coffee plantation, and ends wherever the finished good is sold to a final customer. In between sit a series of linked stages: processing the raw material, manufacturing it into a product, packaging it, shipping it, marketing it, and retailing it. Companies locate each stage in whatever country offers the best combination of cheap labor, raw materials, infrastructure, or market access. That is why a single chocolate bar can touch West Africa for cacao, Europe for processing and manufacturing, and dozens of other countries for retail sale, four continents before anyone takes a bite.

Money moves through the chain the same way the product does, but unevenly. Every stage, processing, transport, manufacturing, marketing, retail, adds its own cost and its own profit margin on top of what came before. By the time a good reaches a shelf, the final price reflects all of those stacked markups, not just the value of the raw material. The farmer or grower at the very start of the chain sold their raw product early and cheaply, before any of that value got added, so their share of the final price shrinks as more steps get layered on.

This connects directly to Von Thunen's logic about land use around a market: both ideas are about distance, cost, and value interacting across space. Commodity chains also explain why agricultural regions specializing in export crops, like coffee or cacao, often stay poor relative to the countries where the processing and retail happen, since the greatest value gets added far from the farm.