I am very impressed by reading the studies (and even equations) of RTW pros like you, and it makes RTW even more interesting. I have a question, since I read here that building roads from a city not only increases the income of the city, but also the income of the provinces around it. The question is, and I wondered about that before, in the description of the market/agora type buildings, it says that it increases the number of economic items available for trade. When you click on building a market/agora, and look in the city details, you'd see an expected increase in city income. Since it adds more item for trade, does building a market/agora in one province also increases the income of the nearby provinces? (in the same way as building roads)