How did the Etruscans influence the Roman economy?

By the 8th Century when Rome was built Etruscans have already established numerous city-states, that had developed agriculture, craft and trade that was a base for development of Roman economy. They traded with the tribes that surrounded them.

Explanation:

In these city-states, that had developed political systems, inside which countries were usually reigned as a monarchies. Those city-states were usually located in the central part of Apennines, which enabled them faster development of all the mentioned labors. Of course, all of these things were later used by the Romans, who just built up their economy on the basis of Etruscans.