Victoria 3 should have a system like EU4 for trading. But let **** go multiple directions ofc. Make blockades actually work etc.
I don't quite understand what you mean by this. EU4 doesn't really have a system for trading - it has a system for deciding who gets the profit of trading that is assumed to take place. If you want trade regions and for trade to flow from one region to the other, I agree.
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I believe what Victoria needs is to make all pops buy/sell their goods to/from merchants. These merchants will have one stockpile per nation in each trade region*, with an import-export quota in place determined by the number level of ports and railroads controlled by the nation, and potentially also by technology and the number of merchants present in the region. Each tick the merchants will use their import-export quota to trade with each other in the way that brings them the most profit. (Exploiting the difference in prices between their local market and the world market to make the most money. Preferably taking tariffs into account.) Merchants in the same region can trade with each other without using the import-export quota (so that among other reasons, landlocked uncivilized nations are still able to trade).
Complexity can be added onto the system by:
- Making trading "cost" wooden/steam ship goods, at different rates depending on which regions are traded between
- If your country pays for the railroad in a foreign country, it counts toward your merchants' import-export quota in that region
- Naval blockades temporarily removes the import-export quota from ports
- If you are at war, you only get import-export from railroads in a trade region if you have unoccupied provinces that border non-hostile countries
Nations should also be able to set policies for each trade region: the ability to ban merchants in one trade region from being able to trade [raw materials/manufactured goods/both] with either [all foreign merchants/non-favoured merchants/foreign merchants in different trade regions].
Further, tariffs should ideally be something you can set per trade region and at three different rates:
- Most-favoured nation rate [which has to be equal to or lower than the foreign rate]
- Foreign rate
- Colonial (in a trade region with at least one state, the rate your merchants pay to import from domestic merchants in a trade region without any states; in a trade region without any states, the rate your merchants pay to import from domestic merchants in a trade region with at least one state.)
- Internal (only for uncivilized nations, import tariff on trading between your own merchant in different trade regions)
Complexity can be added by:
- Making the effectiveness of a ban and the effective tariff subject to the administrative efficiency in the trade region.
- Casus belli for removing trading bans
- Casus belli for demanding most-favoured nation status
- Casus belli for demanding a trade port if trade is restricted to merchants in the region
- Most-favoured nation status is mutual between civilized nations, but can be unilateral between civilized and uncivilized countries
- Dominion merchants are considered domestic merchants
I believe the above would cover most all instances of trade policy in the 19th and 20th century. I have been especially inspired by the Opium wars, the UK restricting indian trade to nations with a presence in the sub-continent, the Perry expedition to Japan and the viability of Danish West India being a result of no import tax. In general, I also think that tariffs are one of the weakest spots of Victoria II. During this period tariffs constituted either the majority or a vast part of states' income, but in Victoria we all avoid it because of the way the internal and world market works. (And also because income tax is too readily available.) I'd like to see tariffs become a real driver in Victoria 3, both as a civilzed nation and as an uncivilized one.
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Suggested trade regions:
- North-America
- Meso-America/Caribbean
- South-America
- Northern-Europe (incl. UK, Benelux, North France and the westernmost parts of Russia)
- East-Europe (Rest of european Russia)
- West-Med (South France, Iberia, Italy, the Maghreb)
- East-Med (Egypt, Balkans, Syria+Palestine, Greece and Anatolia)
- The Gulf (Oman, Nejd, Mesopotamia, Persia)
- Central Asia (Central Asian states, Western China, Siberia)
- Far East (Japan, Korea, Far East Russia and North-East China)
- South China Sea/Indochina (Southern Chinese provinces, Vietnam, Cambodia, Siam)
- Indonesia (Malaysia, Indonesia, the Philippines, Papau New Guinea, Micronesia)
- Australasia (Australia, NZ, Melanesia, Polynesia)
- India (Incl. Burma?)
- Red Sea (The Sudan, Ethiopia, Somalia, Yemen, Hejaz)
- Great lakes region (Uganda, Kenya, Tanzania, Indian Ocean Territories, Madagascar, Northern Mozambique, Rwanda-Urundi, Eastern Congo?)
- Southern Africa
- The Congo
- Western Africa