Generated trade

From EU2Wiki

Generated trade is an income stream created by trading posts and settlements, but not accruing to the owner. Rather, trade flows to centers of trade, and its value as income is allocated to countries according to their merchants. Generated trade in a province is the number shown to the right of the coat of arms of its owner on the province screen.

Generated trade from a province is not affected via occupation. However, it can be eliminated via blockade of a port, or reduced by pirates. You can see this by mousing over the generated trade number; a tooltip will appear breaking down the value as computed below and as affected by outside factors.

The computation of generated trade is fairly simple. First, for each province you need to know the market price of its type of goods. With the market price in hand, the trade generated by a particular trading post or settlement is computed by simply multiplying it by a factor called "Multiplier Type 1". That is,

generated_trade = market_price(province_goods) * multiplier_type_1

The label "multiplier type 1" follows the Econ FAQ at the forums. "Multiplier type 1" is determined by the level of the trading post or colony, or the population of a city.

For trading posts, multiplier type 1 is the trading post's level, plus 4, divided by 10. That is:

 TP Level    multiplier_type_1
 1           0.5
 2           0.6
 3           0.7
 4           0.8
 5           0.9
 6           1.0

For colonies, multiplier type 1 is just the colony level divided by 10. Thus it ranges from 0.1 to 0.9. Finally, for cities it is a logarithmic function of population, according to this table:

 Population  multiplier_type_1  
 1000-5000   1.0
 5001-10000  1.1667
10001-20000  1.3333
20001-40000  1.5
40001-80000  1.6667
80001-200000 1.8333
  200001+    2.0