Economy

Commerce Output
It's the amount of commercial activity that is present in a province.

It's actual effects are:


 * Limiting the maximum size of stockpile based on how high the commerce is (therefore, the higher the commerce output, the higher the maximum amount of stockpiles the province can use for trade -> higher trade potential)
 * Generating trade centers and therefore merchants
 * Giving wage to burghers by employing them in urban commerce industry
 * Setting subsistence rate based on commerce per non subsistence good produced

It is also a condition for some institution invention

Natural Features Modifiers
Natural Features are modifiers that are applied on start of the game.

Trade Benefit represents the province's somewhat historic influence on trading while Natural Harbor presents the natural port capacity of a province.

They provide the following benefits to local commerce output, depending on their rank:


 * Trade Benefit Minor: 10%
 * Trade Benefit Important: 20%
 * Trade Benefit Major: 30%
 * Trade Benefit Major: 30%
 * Trade Benefit Major: 30%


 * Harbor Minor: 5%
 * Harbor Important: 10%
 * Harbor Major: 15%
 * Harbor Major: 15%
 * Harbor Major: 15%

Harbourage Infrastructure also provide local commerce output, starting at rank 2:


 * Rank 2: 5%
 * Rank 3: 10%
 * Rank 4: 15%
 * Rank 5: 20%
 * Rank 6: 25%
 * Rank 7: 30%

while Pathing Infrastructure provides half the local commerce output of harbourages:
 * Rank 2: 2.5%
 * Rank 3: 5%
 * Rank 4: 7.5%
 * Rank 5: 10%
 * Rank 6: 12.5%
 * Rank 7: 15%