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 ...

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 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 ...

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 ...