Editing Europa Universalis (section)

===Trade goods===
Trade goods are a representation of the primary export of any one province. How much of the trade good is produced is determined by production, increased by developing a province with Diplomatic points, Prduction efficiency, which is increased through diplomatic technology and if a Manufactory is present or not. The trade value of these goods is vital to securing a strong economy, so there are better and worse goods whose values change at historical dates when certain triggers are met, although some goods remain good exports throughout the entirety of a campaign. Generally speaking, exotic trade goods like spices and silk are highly valueable and remain so until the end of the game and agricultural products like Grain, Livestock and Fish are pretty terrible. There are two trade goods that have their own unique mechanics: Gold and coal. Gold by itself doesn't generate any trade value and will not be traded on the world market like the other goods, a gold producing province will instead directly generate money in your treasury. This comes at a price though: Overreliance on gold for income causes inflation to rise, which makes everything in your nation more expensive and developing your Gold producing provinces risks the gold mines running dry, which HALVES the income of the province affected by this, cumulatively. The second is coal. Coal will start spawning in the late game (1700s onwards) once you crossed techological thresholds and then become the single most valueable trade good in the game. Coal is also special in that it is the only trade good tied to a building, the Blast Furnace which will crank up the production rates of all goods in your nation by 5% per Furnace built.