It is defined as the sum of the squares of the market shares of each individual firm, when the market shares are expressed as percentages; the result is proportional to the average market share, weighted by market share.
This is equivalent to taking the average market share, weighted by market share. It is defined as the sum of the squares of the market shares of each individual firm, when the market shares are expressed as percentages.
It is defined as the sum of the squares of the market shares of each individual firm, when the market shares are expressed as percentages. This is equivalent to taking the average market share, weighted by market share.
It is defined as the sum of the squares of the market shares of each individual firm, when the market shares are expressed as percentages. This is equivalent to taking the average market share, weighted by market share.