The Amber Road was a European trade route linked to the trade and transport of amber.  Amber met the criteria for remote trade because it was light and had a high demand for ornamental plants in the Mediterranean basin.  Prior to the construction of Roman control of areas such as Pannonie, the Amber Road was virtually the only road available for long-distance transport.  Early Muslim writings confirm that the inhabitants of West Africa operated a sophisticated trading network, usually under the authority of a monarch who collects taxes and supports his kingdom bureaucratically and militarily.  Prior to the strengthening of trade, cities and the West African government, sophisticated economic and political development mechanisms for the African territories concerned were put in place.  The capital, court and trade of the region are mentioned in the works of the scholar Aba `Ubayd `Abd All`h al-Bakr; The main support of Transsahara`s trade was gold and salt.  You can exchange strategic and luxurious resources for gold or other resources. Depending on the level of relations between you, they may or may not agree on more advantageous business terms. A typical example is that if you act a luxury resource: if they are neutral, they do not give you more than 5 gold per train (GPT); If they are friendly, they can give you as much as 7 GPT; If they are kept, you will receive no more than 4 GPTs. An interesting feature of fall 2013 patches is that if you`re not friends with a nation, you can`t even exchange quantities of gold, only per payment round. 4.3. The guidelines for negotiation procedures under Article XXVIII of 198 stipulate that a member conducting such negotiations should submit a report and a joint letter to the secretariat at the end of each bilateral negotiation, and (ii) a final report at the end of all bilateral negotiations. In practice, however, the Secretariat received only 19 final reports for the 79 renegotiations undertaken between 1981 and 1994.
(57) The status of the secretariat for renegotiations without a final report is multiple. While in some cases the parties have withdrawn the use of Article XXVIII, in other cases they have provided only partial information on bilateral agreements. After the launch of numerous renegotiations, the Secretariat received no further information and few of them were formally transferred to the WTO. To begin the agreement, both nations must spend some gold to fund research. The quantity starts at 200 gold and increases as you progress through the ages. The agreement is reached after a set number of laps (30 at standard speed) where both nations receive an immediate boost in research, which applies to their current project. The bonus is calculated as 50% of the median scientific value for all technologies that the player is currently able to explore. If the bonus is enough to complete the current search project and there are still points, they apply to a random technology that you haven`t explored yet. The bonus can be increased by adopting the social policy of the scientific revolution in the rationalist tree, or by building the miracle of the porcelain tower. Trade is essential in the game. Your empire generally cannot become so economically strong that it is completely self-sufficient, and will always have to exchange goods with other nations.