Find the partial derivative.
-Let z = 
Definitions:
Concentration Ratio
A measure used in economics to assess the degree of market concentration by summing the market shares of the top firms in the industry.
Market Share
The proportion of total sales or business that a company or product secures within a particular market.
Industry
A sector of the economy characterized by the production or processing of similar goods or services.
High Concentration Ratio
Indicates that a large percentage of a market is controlled by a few firms, which could suggest less competition.
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