- Farm +20 Food
- Woodcutter's Camp +5 Timber per slot (forest tile)
- Temple +30 Wealth
- Market +30 Wealth
- Dock +30 Wealth
- University +25 Knowledge
- Mine +5 Metal per slot (depends on size of the mountain)
- Oil Well +50 Oil
The completion bonus is fixed and cannot be increased in any way. It can provide a small boost to a nation's early economy and, with some planning, even be used to 'convert' resources. For example, if you have an abundance of timber but are in desperate need for food (e.g. to research some vital technology), use the timber to create some farms and receive an instant +20 food per farm completed.
When a Caravan etablishes a trading route, it receives a one-time bonus of Wealth, at both cities at the end of route, depending on the number of the Commerce tech researched. Generally, more Commerce tech researched, the more wealth is obtained.