Bronze age economy consists mainly of trade with goods and ressources societies depended upon. One of the most important reasources were copper and tin for making bronze, so most of the trade occured between the regions where those minerals were mined. Copper and tin are not evenly distributed so for example one society which gathered bronze definetly needed tin from somewhere else. Therefore trade was a very lively business which spanned from Great Britain through all of Europe to Anatolia and beyond. For other ressources like organic stuff it's not easy to really grasp that though at the moment everything indicates that when it comes to stuff like food most of the villages and cities were autonomous.

A good book on the topic is "1177 BC: The Year Civilization Collapsed" by Eric H. Cline, which covers not just the year mentioned in the title, but also the Mediterranean trade economy that existed before that.

They call it the Bronze Age because that was the hot new technology, mixing tin and copper to create something harder than either. Exactly how hard depended on the percentages, which you choose according to what you want to do with it, like you would choose different steel (another alloy) depending on whether you're making a hinge or a kitchen knife.

Perversely, copper and tin aren't found together. So you need tin from Cornwall or Spain, and copper from Cyprus, to supply the demand.

This wasn't hard to arrange. Stone trade had moved Baltic amber, Afghani lapis lazuli, and East African red ochre around to supply something mainly decorative in the Neolithic. A trader wouldn't make the whole trip to Jericho or Harrappa. Rather, it got traded along much shorter legs, so that the individual trader didn't get too terribly far from home. We can model this on the Neolithic pre-Columbian trading in North America that ran from the Great Lakes to Yucatan..