Oligopoly and interdependence

Explain the twin inefficiencies of monopolistic competition in long run

Explain the effect of ease of entry on industry performance

Predict entry or exit as a competitive industry reaches long-run equilibrium.

Name the process where innovation erodes a leader's dominance.

Give the likely consequence when managers rather than owners decide.

Compute percentage price gap between two supermarket grocery baskets

Interpret figures indicating strong rivalry among grocery retailers

Diagram showing how supermarket interdependence affects grocery shoppers

Evaluate whether grocery retailers meet shoppers' needs effectively

Name the practice of charging varied prices to different buyers.

Identify the welfare loss area when monopoly replaces competition.

State how weaker market demand affects a price taker's revenue.

State the short-run outcome for a firm maximising profit here.

Using data, judge whether Boeing outperformed Airbus in the years after 2014.

Interpret data showing more suppliers push down generic medicine prices

Diagram comparing a single seller's drug pricing with rival-filled markets

Assess whether the pharmaceutical industry's structure harms buyers

Explain why perfectly competitive firms achieve both efficiency types

Discuss effects of separating owners from managers on firm behaviour

Identify the gain to buyers when a fare is cut to zero, using a diagram.

Effect on a small egg producer of a higher going price, using cost curves.

How a firm facing unit-elastic demand throughout could raise its profit.

Infer from revenue and cost curves what the firm is achieving at its chosen output.

Explain the impact of an indirect tax on both surpluses

Assess whether charging different prices is invariably harmful

Assess which statement fits the equilibrium point shown for this firm.

Select the profit-maximising output from a cost schedule given a fixed selling price.

Calculate the overall rise in energy bills over four years

Interpret data indicating energy suppliers abused their dominance

Diagram showing how supplier collusion affects household energy prices

Explain why a firm can vary prices across different customer groups

Discuss whether only producers gain from charging varied prices

Deciding from a diagram whether a price-taking firm making losses should keep trading.

Picking profit-maximising quantities for a rail monopolist serving two separated markets with equal costs.