Most of these technologies found in this building increase the rate of resource collecting as well as ones that improve the food quantities of Farms. The Wheel is considered by some as the most useful upgrade since it makes Villagers move and collect resource faster as well as enabling the development of Chariot units.
Craftsmanship - Increases the gather rate and carry capacity of woodcutters, and the range of archers, towers, and the Scout Ship line; enables the Helepolis upgrade.
Siegecraft - Gives Villagers extra attack against walls and towers; increases the gather rate and carry capacity of stone miners, and the attack and range of Slingers; enables the Heavy Catapult upgrade.
Coinage - Increases the gather rate and carry capacity of gold miners; Gold Mines last longer; makes Market tributes free.
The specialization made possible by the development of agriculture created the need for a place where craftsmen could meet to barter their wares for those of others and for food. The Market in each town and village was the place where barter and exchange took place. The development of the Market marked the change from the small hunting/ foraging group that shared its harvest to the much more complex economy that rose with the rise of towns and cities. Specialization resulted in efficiencies of scale and greater overall production fairly among the food providers and specialists. The profit motive spurred innovation to increase production. The potter, for example, looked for ways to make more and better pots for the same effort to increase the amount of food that he could obtain by trading pots.