7. Determining Market Structure

Which of the following is an econometric approach to determining market structure?

A. Calculating the concentration ratio only

B. Measuring market power by estimating demand and supply elasticities

C. Counting the number of consumers

D. Measuring advertising expenditure only

B. Measuring market power by estimating demand and supply elasticities

Market power can be measured by estimating the elasticity of:

A. Demand and supply

B. Income and consumption

C. Investment and saving

D. Revenue and profit

A. Demand and supply

A highly elastic demand and supply in a market generally indicate that the market is:

A. Close to monopoly

B. Dominated by one firm

C. Close to perfect competition

D. Highly concentrated

C. Close to perfect competition

When demand and supply are highly elastic, firms are generally:

A. Likely to have substantial market power

B. Close to operating under perfect competition

C. Able to control the market price completely

D. Protected by high barriers to entry

B. Close to operating under perfect competition

In the mind map, highly elastic demand and supply are associated with:

A. Monopoly

B. Oligopoly

C. Monopolistic competition

D. Perfect competition

D. Perfect competition

If demand and supply are inelastic, firms are more likely to have:

A. No market power

B. Market power

C. Perfectly elastic demand

D. Zero market share

B. Market power

An inelastic demand and supply relationship suggests that firms:

A. Have some degree of market power

B. Must be price takers

C. Cannot influence market conditions

D. Operate only in perfect competition

A. Have some degree of market power

Which statement correctly compares elasticity and market power?

A. Higher elasticity always means greater market power

B. Inelastic conditions are associated with firms having market power

C. Elasticity has no relationship with market power

D. Perfectly inelastic demand indicates perfect competition

B. Inelastic conditions are associated with firms having market power

Which method uses regression analysis to determine market structure?

A. Cross-sectional regression analysis

B. Concentration ratio analysis only

C. HHI analysis only

D. Accounting analysis

A. Cross-sectional regression analysis

According to the mind map, cross-sectional regression analysis is used instead of:

A. Market-share analysis

B. Concentration analysis

C. Time-series analysis

D. Profit analysis

C. Time-series analysis

Cross-sectional regression analysis is described as a:

A. Simple method

B. Complex method

C. Qualitative method

D. Non-statistical method

B. Complex method

One characteristic of cross-sectional regression analysis is that it can involve:

A. Different specifications of explanatory variables

B. Only one explanatory variable

C. No explanatory variables

D. Identical explanatory variables in every model

A. Different specifications of explanatory variables

Which statement about cross-sectional regression analysis is TRUE?

A. It is simpler than all other methods

B. It replaces all market-share measures

C. It may use different specifications of explanatory variables

D. It does not involve regression

C. It may use different specifications of explanatory variables

Which of the following is NOT an econometric approach mentioned in the mind map?

A. Estimating demand and supply elasticities

B. Cross-sectional regression analysis

C. Using different explanatory-variable specifications

D. Calculating the concentration ratio

D. Calculating the concentration ratio

Which market condition is closest to perfect competition?

A. Highly elastic demand and supply

B. Highly inelastic demand and supply

C. Completely inelastic demand

D. Highly concentrated market share

A. Highly elastic demand and supply

Which market condition suggests greater market power?

A. Highly elastic demand

B. Inelastic demand

C. Perfectly elastic demand

D. Zero demand

B. Inelastic demand

If firms face highly elastic demand, they generally have:

A. More market power

B. Less ability to exercise market power

C. Complete control over price

D. A monopoly position

B. Less ability to exercise market power

Why can inelastic demand indicate market power?

A. Consumers are highly responsive to price changes

B. Firms have greater ability to maintain sales despite price changes

C. Firms have no control over price

D. Products have no value

B. Firms have greater ability to maintain sales despite price changes

Which approach focuses directly on the responsiveness of demand and supply?

A. Econometric approach using elasticity estimates

B. Concentration ratio

C. HHI only

D. Market-share counting

A. Econometric approach using elasticity estimates

Which approach focuses directly on the responsiveness of demand and supply?

A. Econometric approach using elasticity estimates

B. Concentration ratio

C. HHI only

D. Market-share counting

B. Concentration ratio

Which two simpler measures are shown in the mind map?

A. GDP and CPI

B. CR and HHI

C. MR and MC

D. ATC and AVC

B. CR and HHI

CR stands for:

A. Cost Ratio

B. Competition Rate

C. Concentration Ratio

D. Consumer Ratio

C. Concentration Ratio

HHI stands for:

A. Herfindahl-Hirschman Index

B. Household-Human Index

C. High-Holding Index

D. Horizontal-Hierarchy Index

A. Herfindahl-Hirschman Index

The concentration ratio measures:

A. The market share held by the largest firms

B. Total industry costs

C. Consumer income

D. The elasticity of demand

A. The market share held by the largest firms

The concentration ratio is calculated as:

A. Total market sales divided by the largest firm's sales

B. Sum of sales value of the largest x firms divided by total market sales

C. Total profit divided by total sales

D. Total market sales divided by the number of firms

B. Sum of sales value of the largest x firms divided by total market sales

Which formula correctly represents the concentration ratio?

A. CR = Total market sales / Largest firms' sales

B. CR = Largest firm's profit / Total industry profit

C. CR = Sum of sales value of the largest x firms / Total market sales

D. CR = Total market share / Number of firms

C. CR = Sum of sales value of the largest x firms / Total market sales

In the concentration ratio formula, “x firms” refers to:

A. The smallest firms

B. The largest firms being considered

C. Firms outside the industry

D. Random consumers

B. The largest firms being considered

The concentration ratio is expressed as a value between:

A. 0 and 10

B. 0% and 100%

C. 1 and 1000

D. −100% and 100%

B. 0% and 100%

According to the mind map, the concentration ratio satisfies:

A. CR > 100%

B. CR = 0 only

C. 0 ≤ CR < 100%

D. CR < 0

C. 0 ≤ CR < 100%

What is the concentration ratio for a monopoly?

A. 0%

B. 25%

C. 50%

D. 100%

D. 100%

Why is CR equal to 100% in a monopoly?

A. There are no firms

B. One firm accounts for the entire market

C. There are many equally sized firms

D. The market has perfect competition

B. One firm accounts for the entire market

What is the concentration ratio for a perfectly competitive industry according to the mind map?

A. 0%

B. 25%

C. 50%

D. 100%

A. 0%

A CR of 100% indicates:

A. Perfect competition

B. Monopolistic competition

C. Monopoly

D. A market with many equally sized firms

C. Monopoly

A CR of 0% is associated with:

A. Monopoly

B. Perfectly competitive industry

C. Dominant-firm oligopoly

D. Duopoly

B. Perfectly competitive industry

If the largest firms account for a very large percentage of total market sales, the market is generally:

A. More concentrated

B. Less concentrated

C. Perfectly competitive

D. Unrelated to market structure

A. More concentrated

Which statement about concentration ratio is correct?

A. It measures the sales share of selected large firms

B. It measures demand elasticity directly

C. It measures only production costs

D. It measures consumer income

A. It measures the sales share of selected large firms

The Herfindahl-Hirschman Index is calculated as the:

A. Sum of firms' profits

B. Sum of squared market shares of firms

C. Average market share of consumers

D. Sum of production costs

B. Sum of squared market shares of firms

Which formula correctly represents HHI?

A. HHI = Σ market share

B. HHI = Σ squared market share of the ith firm

C. HHI = Total sales / Total firms

D. HHI = Total profit / Total sales

B. HHI = Σ squared market share of the ith firm

In calculating HHI, market shares are:

A. Added without modification

B. Multiplied by total revenue

C. Squared and then summed

D. Divided by the number of firms

C. Squared and then summed

What does the “i” in the HHI formula represent?

A. The ith firm

B. The ith consumer

C. The ith market

D. The ith industry

A. The ith firm

According to the mind map, HHI = 1 represents:

A. Monopoly

B. Oligopoly

C. Perfectly competitive industry

D. Duopoly

C. Perfectly competitive industry

Under the normalized HHI shown in the mind map, a perfectly competitive industry has:

A. HHI = 100

B. HHI = 10

C. HHI = 1

D. HHI = 0

C. HHI = 1

For M firms with equal market shares, HHI equals:

A. M

B. 1/M

C. M²

D. 1 + M

B. 1/M

If there are 4 firms with equal market shares, the HHI is:

A. 4

B. 1/2

C. 1/4

D. 1/16

C. 1/4

If there are 5 firms with equal market shares, the HHI is:

A. 1/5

B. 5

C. 1/25

D. 25

A. 1/5

If there are 10 equally sized firms, the HHI is:

A. 10

B. 1/10

C. 1/100

D. 100

C. 1/100

If there are 20 equally sized firms, the HHI is:

A. 1/20

B. 20

C. 1/400

D. 400

A. 1/20

As the number of equally sized firms increases, HHI:

A. Increases

B. Decreases

C. Remains exactly 1

D. Becomes negative

B. Decreases

For M equally sized firms, a larger M implies:

A. A larger HHI

B. A smaller HHI

C. The same HHI

D. HHI = M²

B. A smaller HHI

If an industry consists of 2 firms with equal market shares, its HHI is:

A. 2

B. 1/2

C. 1/4

D. 1

B. 1/2

If an industry consists of 100 equally sized firms, its HHI is:

A. 100

B. 1/10

C. 1/100

D. 1

C. 1/100

According to the mind map, HHI is:

A. A direct measure of market power

B. Not a direct measure of market power

C. A direct measure of demand elasticity

D. A direct measure of profitability

B. Not a direct measure of market power

Why is HHI not a direct measure of market power?

A. It does not use market shares

B. Market concentration does not directly capture all aspects of market power

C. It cannot be calculated

D. It always equals zero

B. Market concentration does not directly capture all aspects of market power

HHI is less appropriate as a measure of profitability because it:

A. Ignores elasticity of demand

B. Ignores market shares

C. Ignores the number of firms

D. Ignores total market sales

A. Ignores elasticity of demand

Which factor does HHI ignore according to the mind map?

A. Market share

B. Elasticity of demand

C. Number of firms

D. Firm size

B. Elasticity of demand

Why can ignoring demand elasticity be a limitation of HHI?

A. Demand elasticity can influence firms' ability to exercise market power

B. Demand elasticity has no economic meaning

C. Market share becomes zero

D. HHI cannot measure market concentration

A. Demand elasticity can influence firms' ability to exercise market power

Which statement is TRUE about HHI?

A. It directly measures profitability

B. It directly measures market power

C. It is less appropriate as a profitability measure because it ignores demand elasticity

D. It is based on demand elasticity

C. It is less appropriate as a profitability measure because it ignores demand elasticity

Which statement is FALSE about HHI?

A. It is based on squared market shares

B. It can be calculated for equally sized firms using 1/M

C. It directly measures market power

D. It ignores elasticity of demand

C. It directly measures market power

Which measure is calculated using the sales value of the largest x firms?

A. HHI

B. CR

C. GDP

D. CPI

B. CR

Which measure is calculated by summing squared market shares?

A. CR

B. HHI

C. ATC

D. MR

B. HHI

Which measure can equal 100% for a monopoly?

A. HHI only

B. Concentration ratio

C. Both necessarily in the same units

D. Neither

B. Concentration ratio

Which measure is specifically based on the market shares of the largest x firms?

A. HHI

B. Concentration ratio

C. Elasticity

D. Regression coefficient

B. Concentration ratio

Which measure gives greater weight to larger market shares because the shares are squared?

A. Concentration ratio

B. HHI

C. Supply elasticity

D. Demand elasticity

B. HHI

If one firm becomes much larger relative to other firms, which measure will reflect this through squared market shares?

A. HHI

B. CR only

C. Time-series regression

D. Supply elasticity

A. HHI

Which approach is generally more complex according to the mind map?

A. Concentration ratio

B. HHI

C. Cross-sectional regression analysis

D. Market-share counting

C. Cross-sectional regression analysis

Which approach belongs to the “Simpler Measures” category?

A. Cross-sectional regression

B. Elasticity estimation

C. Concentration ratio

D. Different explanatory-variable specifications

C. Concentration ratio

Which of the following belongs to the “Econometric Approaches” category?

A. HHI

B. Concentration ratio

C. Estimating demand and supply elasticities

D. Market-share ranking

C. Estimating demand and supply elasticities

Which of the following belongs to the “Simpler Measures” category?

A. Cross-sectional regression

B. Time-series regression

C. Concentration ratio

D. Elasticity estimation

C. Concentration ratio

A market has highly elastic demand and supply. Based on the mind map, the market is likely:

A. Close to perfect competition

B. Close to monopoly

C. Highly concentrated

D. Dominated by a single firm

A. Close to perfect competition

A market has inelastic demand and supply. This suggests that firms:

A. Have market power

B. Must be price takers

C. Are necessarily perfectly competitive

D. Have zero market share

A. Have market power

Which statement correctly combines elasticity and market structure?

A. Highly elastic conditions are associated with markets close to perfect competition

B. Highly elastic conditions always indicate monopoly

C. Inelastic conditions indicate no market power

D. Elasticity is irrelevant to market power

A. Highly elastic conditions are associated with markets close to perfect competition

Which statement correctly combines CR and HHI?

A. CR uses squared market shares, while HHI uses total sales only

B. CR uses sales of the largest x firms, while HHI sums squared market shares

C. Both are regression methods

D. Both directly measure demand elasticity

B. CR uses sales of the largest x firms, while HHI sums squared market shares

An industry has one firm controlling all market sales. Which combination is correct?

A. CR = 0% and HHI = 1/M

B. CR = 100% and HHI = 1

C. CR = 50% and HHI = 0

D. CR = 0% and HHI = 1

B. CR = 100% and HHI = 1

An industry approaches perfect competition with many equally sized firms. What happens to normalized HHI?

A. It approaches 1

B. It approaches 0

C. It becomes greater than 1

D. It becomes negative

B. It approaches 0

Which measure is especially useful for showing the distribution of market shares because it squares each firm's share?

A. Concentration ratio

B. HHI

C. Demand elasticity

D. Cross-sectional regression

B. HHI

Which statement BEST summarizes the purpose of determining market structure?

A. To identify the degree of competition and market power using different measures

B. To calculate consumer income only

C. To determine government expenditure

D. To measure inflation only

A. To identify the degree of competition and market power using different measures