I'm leaving my old circle (various reasons), but it's a great trade set and if you have the right resources, this one is ready to go for you. It's specifically designed to maximize population and income. If you're a smaller nation and haven't maxed out on your improvements, the unseen benefit is it opens up additional improvement slots, so your income benefit is even more than just what's listed below (provided you buy them, of course).
Check it out:
BRs: Jewelry, affluent population, steel
Citizens +33.1%
Happiness +13
Income +$10
Soldier efficiency +24.2%
Infra cost -10.6%
Infra Upkeep -10%
land cost -14.5%
land bonus +15%
and others...
Fish: Sobel http://www.cybernations.net/nation_drill_d...ation_ID=179759
Gems: Sobel
Cattle: cajonistan http://www.cybernations.net/nation_drill_d...ation_ID=340804
Gold: cajonistan
Coal: Duria http://www.cybernations.net/nation_drill_d...ation_ID=302202
Wine: Duria
Furs: Gregorya http://www.cybernations.net/nation_drill_d...ation_ID=261921
Wheat: Gregorya
Pigs: Wiggliana http://www.cybernations.net/nation_drill_d...ation_ID=271931
Silver: Wiggliana
Water:
Iron:
Alternate resource combos that work:
sugar and spices together (gives fast food, +2.5 additional happiness, +3% additional citizens)
oil and lead together (gives microchips, +1 additional happiness)
Other combos can work as well, but you lose construction w/o iron.
If you don't have one of the desired combinations but are interested, post anyway and we'll see what the others have to say.