The price arbitrage update — Ymir Steam update #877844

This quick update fixes critical gamedesign flaws in the economic simulator post-currency. Price arbitrage A new price factor has been added : price arbitrage. It represents the natural arbitrage that would happen between the prices of cities that are near to one another when there are big local price discrepancies between them. Price arbitrage calculates a “world area price” for each resource of the city, by looking at the price of that same resource in all nearby territories the city has trading relations with, weighted by proximity with the city. That includes other cities of the player, but also all foreign cities they have trading rights or rights of passage with. Based on the difference between that world price and the current local price, it determines the price arbitrage modificator that is applied to get the final effective price of the resource. The goal of this feature is to h...