When Mothers in Their 60s and 70s Were Asked About

question 73

Multiple Choice

When mothers in their 60s and 70s were asked about being close to a particular child:

• A)the mothers said they did not feel comfortable identifying such a child
• B)the mothers said that they could not say
• C)seventy percent reported that they were closer to a particular child
• D)the mothers said the mark of a good mother is not to choose among her children

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Definitions:

Four-Firm Concentration Ratio

A metric that measures the total market share of the four largest firms within an industry, used to assess the degree of competition and market concentration.

Herfindahl Index

An index determining the level of market concentration by aggregating the squared market shares of all companies in the sector.

Market Share

The fraction of a market occupied by an individual company or product, often described by its percentage of aggregate sales in the market.

Herfindahl Index

A measure of market concentration used to determine the amount of competition among firms within an industry.