EFB336 Chap.9 Multinational Market Power and Taxation
Multinational Market Power and Taxation
Multinational firms can combine productive efficiency with substantial market power and organisational flexibility across jurisdictions. A firm with a downward-sloping demand curve chooses output where marginal revenue equals marginal cost, creating a markup and a deadweight loss relative to competitive output. Cross-border group structure also creates opportunities to report profit where tax treatment is favourable.
Policy responses must balance revenue, competition, investment incentives, administrative capacity and international coordination.
What this chapter covers
- 01
Market power and downward-sloping demand
- 02
Marginal revenue and profit-maximising output
- 03
Markup, consumer surplus and deadweight loss
- 04
Multinational location and internal transactions
- 05
Profit shifting across tax jurisdictions
- 06
Competition and international tax coordination
Worked example · free
Calculate monopoly output and markup
- +1Set marginal revenue equal to marginal cost: 100 − 2Q = 20.
- +1Rearrange to 2Q = 80, so Q = 40 units.
- +1Insert output into demand: P = 100 − 40 = $60.
- +1The markup is P − MC = $60 − $20 = $40 per unit.
Key terms
- Markup
- The amount by which a firm’s price exceeds its marginal cost.
- Profit shifting
- Arranging reported income or deductions so taxable profit appears in a lower-tax jurisdiction.
- Transfer pricing
- The pricing of transactions between related entities within the same multinational group.
- Effective tax rate
- Tax paid relative to an appropriate profit measure over a stated period, which can differ from the statutory rate because of deductions, losses, timing and cross-border allocation.
Multinational Market Power and Taxation FAQ
Why does a monopolist not price from marginal revenue?
Marginal revenue determines the profit-maximising quantity when equated with marginal cost. Price is then read from the demand curve for that quantity. Confusing the two curves understates the price because marginal revenue lies below demand for a downward-sloping demand schedule.
Why can multinationals shift reported profit?
A multinational conducts transactions among related entities and owns mobile assets such as intellectual property. Choices about internal prices, financing and asset location can change where profit is recorded. Rules and enforcement seek to align taxable profit more closely with real economic activity.
What trade-off does tax coordination create?
Coordination can reduce incentives to move reported profit and protect national revenue bases. It may also constrain tax competition and interact with genuine location decisions. Analysis should distinguish shifts in accounting profit from changes in factories, employment or research activity.
How can I evaluate market power and tax policy together?
Begin by diagnosing the margin. Product-market power concerns the price, quantity and entry outcome, whereas profit shifting concerns the jurisdiction in which a group reports income. Recompute a monopoly case after a marginal-cost change and compare it with a fixed-cost change: marginal cost alters the operating quantity, while a fixed cost can alter profit or entry without moving the chosen quantity.
Then draw a multinational with a producer, an intellectual-property owner and a sales affiliate. Track a royalty, interest payment or internal price through each entity’s taxable profit while keeping consolidated revenue fixed. Ask what independent-market evidence would support the internal price and whether the arrangement changes real payroll, assets or research.
Competition intervention may reduce an exclusionary barrier or markup but leave booked profit mobile. A coordinated tax rule may protect revenue while leaving the same product-market concentration. Evidence should therefore cover prices, market shares and entry as well as effective tax, related-party payments and the location of workers and assets.
Finish with two linked recommendations only when two problems have actually been shown. For each recommendation, state the behavioural response: accounting restructuring, relocation of real activity, a price change, entry or a partner-country policy reaction. This prevents one dramatic statistic, such as firm size or a low effective tax rate, from proving both market power and profit shifting.
The analysis should match the tool to the mechanism and keep revenue, competition, investment and enforceability as separate evaluation criteria.
Exam move
Build confidence by keeping the product-market and tax problems on separate sheets before connecting them. For market power, write inverse demand and derive or use marginal revenue. Set marginal revenue equal to marginal cost to find the profit-maximising quantity, then return to the demand curve for price. Calculate the markup as price minus marginal cost.
On a diagram, identify competitive output where demand meets marginal cost, the lower monopoly output and the trades lost between them. If a fixed cost changes, explain why the operating quantity may stay unchanged while entry or total profit changes. If marginal cost changes, repeat the optimisation rather than shifting profit alone. For multinational taxation, draw two networks.
The first records factories, workers, customers and shipped products; the second records royalties, interest, internal service charges and reported profit. Use that separation to explain how accounting profit can move without an equivalent relocation of employment or production.
Review the main behavioural margins as distinct cases: a transfer price changes the value assigned to a related-party transaction, internal debt changes interest deductions, and ownership of an intangible changes where royalty income appears. A reform may alter these reports, the legal structure or real investment, and each response has a different welfare implication. Compare policy tools by objective.
Competition intervention targets entry barriers, exclusion or mergers and can affect markups. Tax coordination protects revenue bases and reduces incentives to report profit in low-tax jurisdictions. Neither tool automatically achieves the other’s purpose. Practise one numerical monopoly problem and one qualitative profit-flow case each session.
Conclude policy essays with five tests: revenue raised, change in real investment, change in market competition, administrative measurability and international response. This prevents a headline tax rate or firm size from becoming a complete analysis and makes the final recommendation conditional on the margin that evidence actually shows.
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