Yield

refers to one or more of the numerical statistics given (yielded) to a city by a tile when worked by a citizen. It encompasses the basic statistics of food, production, and a particular game's economic commodity (trade/commerce in earlier games, gold in later ones). In later games, additional statistics such as science, faith, and culture can also be yields.
A tile's initial yields are determined by its terrain type. These values are further modified by the resource and/or improvement present on the tile. Pollution reduces yields in games that feature it. Certain governments also affect the gross yields provided to the city.
A city's net yields are based on multiple factors that vary from game to game. Buildings such as Banks and Factories can provide multiplicative bonuses, while certain wonders such as the Colossus can give flat increases per tile. Other factors, such as unit maintenance and corruption and waste mechanics, can reduce the net yields.
Category:Game concepts