How do trade yields work?

[Joch]

Having trouble with this one. I looked through the manual, but could not find the answer and it is not that clear from the game.

1. external trade routes:

you see two sets of numbers:
-left arrow with + energy/+science.
-right arrow with + energy/+science.

Based on station yields, it seems the left arrow is the return to your city and the right arrow is the yield to the AI city. So far fine.

But how do the yields work? For example, assume a TR has +8 for my City and +6 for the AI city. Is it double counted? (i.e. +8 for me and +6 for him = +14 combined total) or is it just the net amount? (i.e. +8-+6= +2 for my City) The more I look at this game, the more it looks like the amount is double-counted which would explain why TRs quickly generate huge numbers.

2. internal trade routes.

same question, although the internal trade routes seem to work by the Net amount, i.e. +6 food to City A and +2 food to City B results in an actual transfer of +4 food from City B to City A.

Thoughts?

 

[KrikkitTwo]

http://forums.civfanatics.com/showthread.php?t=537038

Basically it depends on the difference in base yields
high production city+low production city= high production trade route
high production city+ high production city=low/no production trade route
low production city+ low production city=low/no production trade route
receiver gets most of the bonus

 

[LastChime]

So " --> " is what the route destination gets, and "<--" Is what comes back to the source of the route?

 

[Joch]

http://forums.civfanatics.com/showthread.php?t=537038

Thanks, did not see that thread.

 

[Joch]

So " --> " is what the route destination gets, and "<--" Is what comes back to the source of the route?

that is correct.