Collective economy is an Imperial Age technology in Age of Empires III: The Asian Dynasties. It is available at the Rice Paddy if Rice Exports has been researched first.

This technology lets the player gather coin from Mines, Rice Paddies, Plantations (all three with Villagers) and Whales (with Fishing Boats) 50% faster.

Collective Economy is similar to the European Excessive Taxation and the Native American Excessive Tribute.

Rice Paddy Technologies
Paddy Treshing | Rice Surplus | Irrigation Channels | Rice Trade | Dike-Controlled Canals | Rice Markets | Rice Exports | Mechanized Rice Cultivation | Collective Economy