What Is the Concentration Ratio? The concentration ratio, in economics, is a ratio that indicates the size of firms in relation to their industry as a whole. Low concentration ratio in an industry ...

The four-firm concentration ratio (a standard measure of market power) has increased considerably in the U.S. fertilizer market since the late 1990’s. • Nitrogen, up from 54 percent to 65 ...

An industry’s concentration ratio is the size of a certain number of firms in an industry compared to its total size. It is used to calculate one or more firms’ dominance of their sector. CR is ...

The concentration ratio is a good, intuitive measure of the number and relative power of firms in an industry. The four-firm concentration ratio, denoted by CR4, is the combined market share of ...