While our sources mention numerous prices of a wide range of commodities, the question remains to what extent these prices offer insight into the ancient economy. Despite the wealth of data, reliable prices of everyday goods under normal market conditions are rare. The extent to which they can be used to analyze such topics as market integration, living standards, market stability, and inflation is limited. Only regarding Ptolemaic and Roman Egypt do we possess sufficient market prices (rather than imposed prices or valuations) to conduct meaningful analyses. For most of the rest of the empire, the prices—in particular those of everyday goods—are generally too uncertain, too sparse, and too diverse to form a solid basis for economic analysis. It is a valid question, moreover, to what extent prices in the ancient world reflect the interplay of supply and demand according to modern economic theory. Nevertheless, ancient writers depict price levels as depending on the interplay of supply and demand, and market transactions, as narrated in our sources, emphasizing competition and bargaining, make clear that price formation was largely determined by economic forces. Hence, prices fluctuated over time and differed in various places. The authorities tried to keep prices of staple foods low by influencing market conditions, but direct price fixing was rare.
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