Margin Squeeze Calculation Methodologies

1. Introduction

A margin squeeze occurs where a vertically integrated dominant undertaking operates at both an upstream level and a downstream level and sets the relationship between its upstream and downstream prices so that an equally efficient downstream competitor cannot profitably compete.

The central economic question is:

Is the spread between the dominant firm's upstream price and the relevant downstream price sufficient to cover the appropriate measure of downstream costs?

The basic calculation is therefore:

Downstream price − upstream transfer price = available margin

That margin is then compared with an appropriate measure of downstream cost.

Margin squeeze analysis is particularly important in telecommunications, digital platforms, cloud computing, payment systems, app stores, data infrastructure and other vertically integrated markets.

2. Basic Mathematical Model

Suppose a vertically integrated firm supplies an essential or important upstream input at price Pᵤ and sells the downstream product at price P𝒹.

The nominal margin is:

M=Pd−PuM=P_d-P_u

The percentage margin can be expressed as:

M%=Pd−PuPd×100M_{\%}=\frac{P_d-P_u}{P_d}\times100

But a positive margin does not necessarily mean that there is no margin squeeze.

The relevant comparison is generally:

Pd−Puvs.CdP_d-P_u \quad \text{vs.} \quad C_d

where Cᵈ represents the relevant downstream costs.

A potential squeeze exists where:

Pd−Pu<CdP_d-P_u<C_d

subject to the applicable legal and economic test.

3. Why Calculation Methodology Matters

Margin squeeze cases involve several methodological choices:

1. Which upstream price should be used?
2. Which downstream price should be used?
3. Which downstream costs should be included?
4. What quantity or period should be analysed?
5. Should the test use the dominant firm's costs or those of an equally efficient competitor?
6. How should fixed and common costs be allocated?
7. How should rebates, discounts and bundled products be treated?
8. How should non-price terms be incorporated?
9. How should losses during an investment or entry period be treated?

These choices can substantially change the result.

4. The Three Core Calculation Approaches

A. Price-Cost Spread Test

The simplest approach compares the downstream price with the upstream price plus downstream costs:

S=Pd−Pu−CdS=P_d-P_u-C_d

Where:

• S > 0 → potentially sufficient margin;
• S = 0 → break-even;
• S < 0 → potential margin squeeze.

Example

Suppose:

• Upstream access price = £60
• Downstream price = £100
• Downstream costs = £50

Then:

100−60−50=−10100-60-50=-10

The downstream operation loses £10 per unit.

This indicates a potential squeeze.

5. Areeda-Turner / Cost-Based Methodologies

The traditional antitrust approach asks whether the downstream price is below an appropriate cost benchmark.

Different cost concepts can be used.

Average Variable Cost — AVC

AVC=Variable CostsOutputAVC=\frac{\text{Variable Costs}}{\text{Output}}

A price below AVC can indicate that the undertaking cannot cover short-run variable costs.

However, AVC is generally more associated with predatory pricing analysis than modern margin-squeeze analysis.

Average Avoidable Cost — AAC

AAC measures costs that could have been avoided if the relevant downstream output had not been produced.

AAC=Avoidable Downstream CostsRelevant OutputAAC=\frac{\text{Avoidable Downstream Costs}}{\text{Relevant Output}}

It is particularly useful where the authority wants to determine the incremental economic burden associated with serving the relevant customers.

6. Long-Run Average Incremental Cost — LRAIC

LRAIC asks what the undertaking's downstream operation must recover over the longer term.

LRAIC=Long-run incremental costsIncremental outputLRAIC=\frac{\text{Long-run incremental costs}}{\text{Incremental output}}

The margin-squeeze condition becomes:

Pd−Pu<LRAICP_d-P_u<LRAIC

This methodology is particularly relevant in network industries because infrastructure involves substantial fixed and sunk investment.

7. Average Total Cost — ATC

Average total cost includes variable and allocated fixed costs:

ATC=VC+FCQATC=\frac{VC+FC}{Q}

A margin squeeze can therefore be expressed as:

Pd−Pu<ATCP_d-P_u<ATC

ATC is potentially appropriate where the question is whether the downstream business can sustainably recover the costs attributable to its operations.

But allocating common fixed costs can be highly controversial.

8. Long-Run Average Incremental Cost Plus Common Costs

Some investigations require an expanded benchmark.

The calculation may be:

Pd−Pu≥LRAIC+appropriate common costsP_d-P_u \geq LRAIC+\text{appropriate common costs}

This avoids the possibility that a dominant firm technically covers incremental costs while systematically failing to recover economically necessary common costs.

9. The "Equally Efficient Operator" Test

One of the most important methodologies is the equally efficient competitor test.

The question is:

Could a downstream competitor that is as efficient as the dominant undertaking compete profitably at the dominant firm's upstream and downstream prices?

The calculation is:

Pd−Pu−CEECP_d-P_u-C_{EEC}

where Cᴇᴇᴄ is the downstream cost of an equally efficient competitor.

If:

Pd−Pu<CEECP_d-P_u<C_{EEC}

there may be a margin squeeze.

This methodology focuses on protecting competition, rather than protecting less-efficient competitors.

10. The Dominant-Firm Cost Test

Another methodology uses the dominant firm's own downstream costs.

This can be expressed as:

Pd−Pu−CDFP_d-P_u-C_{DF}

where Cᴅғ represents the relevant downstream costs of the dominant firm.

The rationale is that the dominant undertaking controls both prices and possesses detailed knowledge of its own cost structure.

The important question is therefore:

Could the dominant undertaking itself profitably operate downstream at the wholesale price that it imposes on rivals?

11. Deutsche Telekom Methodology

The judgment in Deutsche Telekom AG v Commission is one of the foundational EU margin-squeeze authorities.

The methodology examined whether the spread between wholesale and retail prices was insufficient to cover the dominant firm's own downstream costs.

The calculation can be simplified as:

Retail Price−Wholesale Price<Downstream CostsRetail\ Price-Wholesale\ Price < Downstream\ Costs

The importance of the case is that a margin squeeze can constitute an abuse even where the wholesale price itself is not independently abusive and the retail price itself is not necessarily predatory.

The abuse arises from the relationship between the two prices.

12. TeliaSonera: No Mandatory Mechanical Formula

In TeliaSonera Sverige AB v Konkurrensverket, the Court of Justice clarified the legal treatment of margin squeeze under Article 102 TFEU.

The Court rejected the idea that every margin squeeze necessarily depends upon precisely the same conditions as refusal-to-supply cases.

The calculation therefore cannot be treated as a purely mechanical accounting exercise.

Relevant questions include:

• the nature of the upstream product;
• the circumstances of access;
• the actual or potential competitive effects;
• whether the margin is negative or insufficient;
• whether competitors are foreclosed;
• the economic context.

Thus:

Negative/insufficient margin≠automatic liabilityNegative/insufficient\ margin \neq automatic\ liability

and conversely:

Positive margin≠automatic absence of abusePositive\ margin \neq automatic\ absence\ of\ abuse 

13. Telefónica / Wanadoo and Cost Benchmarking

The Telefónica litigation demonstrates the importance of sophisticated cost analysis in telecommunications markets.

The investigation examined whether the spread between wholesale broadband access prices and retail prices was insufficient to allow an efficient downstream competitor to compete.

Relevant calculations can include:

Retail Revenue−Wholesale Access Cost−Downstream CostsRetail\ Revenue-Wholesale\ Access\ Cost-Downstream\ Costs

The analysis may then be performed over different periods to determine whether the squeeze was:

• temporary;
• persistent;
• increasing;
• decreasing; or
• associated with particular customer segments.

14. Post Danmark II and Cost Concepts

Although Post Danmark II concerned loyalty rebates rather than a pure margin squeeze, it is useful for understanding modern cost-based competition analysis.

The broader principle is that authorities must identify an economically appropriate cost benchmark and examine the competitive mechanism rather than simply observing that a price is low.

This is particularly relevant where discounts or rebates affect the effective downstream price.

15. Bronner and the Relationship with Access Obligations

Oscar Bronner GmbH & Co. KG v Mediaprint is principally an essential-facilities/refusal-to-supply case rather than a margin-squeeze case.

It is nevertheless important because it demonstrates that competition law distinguishes between:

• imposing an access obligation; and
• assessing the competitive consequences of prices once access is supplied.

This distinction matters when determining whether the upstream input is genuinely indispensable or whether alternative inputs exist.

16. Slovak Telekom

Slovak Telekom a.s. v Commission is especially important for modern margin-squeeze methodology.

The case involved telecommunications infrastructure and wholesale access.

The Court confirmed that margin squeeze analysis may focus on whether the dominant firm's pricing structure makes effective downstream competition impossible or excessively difficult.

The case is significant because it illustrates that authorities must analyse:

• wholesale prices;
• retail prices;
• downstream costs;
• alternative products;
• customer migration;
• network economics;
• duration of the conduct.

It also illustrates the importance of distinguishing margin squeeze from a conventional refusal to supply.

17. Google Shopping and Broader Price/Ranking Effects

Google Shopping was not a conventional margin-squeeze case.

Nevertheless, it is methodologically relevant to digital markets because it demonstrates that competitive assessment cannot always be reduced to a simple price-cost test.

For digital platforms, the relevant economic margin may involve:

• monetary prices;
• advertising revenue;
• data extraction;
• ranking advantages;
• access conditions;
• traffic diversion;
• self-preferencing;
• quality reductions.

Thus, a digital margin-squeeze calculation may require a broader economic model.

18. Digital Platform Margin Squeeze

Consider a vertically integrated digital platform.

It operates:

AI/cloud infrastructure → API layer → application marketplace → downstream application

Suppose:

• API access price = $40
• downstream application price = $100
• downstream operating cost = $70

Then:

100−40=60100-40=60

Available margin:

6060

But downstream cost is:

7070

Therefore:

60−70=−1060-70=-10

There is a $10 per-unit margin deficit.

A rival as efficient as the platform would therefore be unable to cover downstream costs.

19. Effective Price Methodology

Nominal prices are not always the correct prices.

Suppose a platform charges:

• headline price = $100;
• rebate = $20;
• mandatory service fee = $10.

The effective price may be:

100−20+10=90100-20+10=90

The calculation should therefore use:

Effective Price−Upstream Price−Downstream CostEffective\ Price-Upstream\ Price-Downstream\ Cost

rather than merely the published price.

This is crucial in markets with:

• rebates;
• loyalty discounts;
• minimum commitments;
• volume discounts;
• promotional credits;
• bundled services.

20. Bundled Products

Suppose the dominant firm sells:

Product A + Product B = £100

while Product A is the upstream input.

The analyst must determine how much of the £100 should be attributed to Product B.

Possible methods include:

Stand-alone pricing

PBstandaloneP_B^{standalone}

Incremental pricing

PBincrementalP_B^{incremental}

Revenue allocation

PB=Revenue attributable to BRelevant unitsP_B=\frac{Revenue\ attributable\ to\ B}{Relevant\ units}

The selected allocation method can materially affect the squeeze calculation.

21. Multi-Product Margin Squeeze

Digital platforms frequently sell several downstream products simultaneously.

The relevant calculation may therefore be:

∑Pdi−Pu−∑Cdi\sum P_{d_i}-P_u-\sum C_{d_i}

For example:

The analyst must then determine whether all revenue streams are economically attributable to the relevant downstream activity.

22. Time-Based Calculation

Margin squeeze may change over time.

The analyst may calculate:

Mt=Pd,t−Pu,t−Cd,tM_t=P_{d,t}-P_{u,t}-C_{d,t}

for each month or quarter.

Example:

This suggests that the squeeze became progressively more severe.

23. Discounted-Cash-Flow / Present-Value Method

Some infrastructure markets require a longer-term analysis.

The relevant calculation can be:

NPV=∑t=1TRevenuet−Costt(1+r)tNPV=\sum_{t=1}^{T}\frac{Revenue_t-Cost_t}{(1+r)^t}

where:

• r = discount rate;
• t = time period;
• T = relevant period.

A competitor may tolerate short-term losses if the overall investment has a positive expected NPV.

Therefore:

A short-term negative margin does not necessarily prove an economically irrational or exclusionary strategy.

24. Customer-Segment Methodology

A margin squeeze may exist only for certain customer categories.

For example:

• enterprise customers;
• small businesses;
• high-volume customers;
• low-volume customers;
• new customers;
• switching customers.

The authority can calculate:

Mi=Pd,i−Pu,i−Cd,iM_i=P_{d,i}-P_{u,i}-C_{d,i}

for each customer segment i.

This prevents profitable customers from masking a squeeze targeted at strategically important rivals or customers.

25. Weighted-Average Method

Where prices vary substantially:

Pweighted=∑PiQi∑QiP_{weighted}= \frac{\sum P_iQ_i}{\sum Q_i}

The same approach can be applied to costs.

This is useful where a platform has:

• different subscription tiers;
• geographical prices;
• enterprise discounts;
• usage-based pricing;
• different API rates.

26. Volume-Weighted Margin

The total economic margin can be expressed as:

Mtotal=∑i(Pd,i−Pu,i−Cd,i)QiM_{total}=\sum_i(P_{d,i}-P_{u,i}-C_{d,i})Q_i

This is often more informative than a simple arithmetic average because high-volume customers receive greater economic weight.

27. Accounting Costs vs Economic Costs

One major methodological problem is that accounting costs do not necessarily equal economic costs.

For example:

• depreciation may not reflect economic asset consumption;
• historical costs may differ from replacement costs;
• common infrastructure may serve several markets;
• R&D may benefit multiple products.

Consequently:

Accounting Cost≠Economic CostAccounting\ Cost\neq Economic\ Cost

Competition authorities may therefore reconstruct costs using economic rather than purely accounting concepts.

28. Incremental-Cost Allocation

Where an infrastructure asset supports several activities, only an appropriate portion should be allocated to the downstream product.

For example:

Cloud infrastructure cost = £100 million

If 40% is attributable to the relevant downstream activity:

Relevant Cost=£100m×40%=£40mRelevant\ Cost=£100m\times40\%=£40m

Incorrect allocation of the entire £100 million could falsely produce a margin squeeze.

Conversely, allocating too little could conceal one.

29. Avoidable-Cost Counterfactual

Another methodology asks:

What costs would the dominant firm avoid if it did not supply the relevant downstream output?

The calculation becomes:

Pd−Pu−AACP_d-P_u-AAC

This is particularly useful for distinguishing genuinely exclusionary pricing from prices that merely appear low because of accounting allocations.

30. Efficient Competitor vs Actual Competitor

A crucial distinction is:

Actual competitor test

Could the particular rival compete?

versus

Equally efficient competitor test

Could a competitor with the dominant firm's relevant efficiency compete?

The second is generally more useful for determining whether the dominant firm's pricing structure itself creates competitive foreclosure.

A less-efficient competitor may fail even where no abusive margin squeeze exists.

31. Hypothetical Numerical Example

Assume:

• Wholesale price = €70
• Retail price = €110
• Downstream cost = €45

Then:

110−70=40110-70=40

Available margin:

€40€40

Downstream cost:

€45€45

Therefore:

40−45=−€540-45=-€5

The downstream competitor faces a €5 shortfall per unit.

If annual sales equal 2 million units:

€5×2,000,000=€10m€5\times2,000,000=€10m

The annual competitive shortfall is therefore €10 million.

32. Break-Even Wholesale Price

The calculation can be reversed.

If:

Pd=€110P_d=€110

and:

Cd=€45C_d=€45

the maximum upstream price compatible with downstream break-even is:

Pu=Pd−CdP_u=P_d-C_d

Therefore:

Pu=110−45=€65P_u=110-45=€65

If the actual wholesale price is €70, the €5 difference represents the squeeze.

33. Break-Even Retail Price

Similarly:

Pd=Pu+CdP_d=P_u+C_d

If:

• upstream price = €70;
• downstream costs = €45;

then:

Pd=€115P_d=€115

A downstream price below €115 would fail the selected cost benchmark.

34. Critical Margin Calculation

The critical margin is the minimum price spread necessary to cover relevant downstream costs.

Critical Margin=CdCritical\ Margin=C_d

The observed margin is:

Observed Margin=Pd−PuObserved\ Margin=P_d-P_u

The squeeze percentage can then be expressed as:

Squeeze Gap=Cd−(Pd−Pu)Squeeze\ Gap= C_d-(P_d-P_u)

This provides a useful measure of the severity of the squeeze.

35. Sensitivity Analysis

Because cost allocation can be controversial, authorities should test different assumptions.

Example:

The conclusion changes depending on the benchmark.

This demonstrates why sensitivity analysis is essential.

36. Counterfactual Analysis

The investigator should ask:

What would competition look like if the upstream/downstream price relationship were not imposed?

Possible counterfactuals include:

1. competitive wholesale price;
2. regulated access price;
3. historical price;
4. hypothetical equally efficient competitor;
5. alternative infrastructure;
6. technologically feasible substitute.

The difference can be represented as:

Competitive Margin−MarginactualCompetitive\ Margin-Margin_{actual} 

37. Pass-Through and Demand Effects

The immediate margin is not necessarily the complete economic effect.

Suppose a squeeze raises a rival's costs by £10.

The rival may:

• absorb the loss;
• raise prices;
• reduce quality;
• exit;
• reduce investment.

If the rival passes 70% through to consumers:

Consumer Price Increase=£10×70%=£7Consumer\ Price\ Increase=£10\times70\%=£7

The authority can then assess output and welfare effects.

38. Dynamic Margin Squeeze

Modern digital markets require dynamic analysis.

The calculation can incorporate:

Mt=Pd,t−Pu,t−Cd,tM_t=P_{d,t}-P_{u,t}-C_{d,t}

but also:

• user acquisition;
• switching;
• network effects;
• data accumulation;
• learning effects;
• interoperability;
• ecosystem lock-in.

A temporary negative margin may be strategically significant if it prevents competitors from reaching the scale necessary to become viable.

39. Margin Squeeze in AI and Cloud Markets

A modern example could involve:

GPU/cloud infrastructure → model API → downstream AI application

Suppose:

• cloud/GPU access = $50;
• platform's downstream AI service price = $100;
• efficient downstream cost = $60.

Then:

100−50−60=−10100-50-60=-10

The rival has a $10 unit deficit.

But the analysis should also consider:

• reserved-capacity discounts;
• GPU scarcity;
• compute credits;
• API rate limits;
• model-access conditions;
• data advantages;
• interoperability restrictions;
• preferential access to infrastructure.

Thus, the "price" may need to be calculated as an effective economic access cost, rather than merely the published tariff.

40. Six Key Case Laws

1. Deutsche Telekom AG v European Commission

Principle: A margin squeeze can constitute an abuse where the spread between wholesale and retail prices is insufficient to cover the dominant firm's downstream costs.

Methodological importance: Established the central price-spread/cost comparison in EU law.

2. TeliaSonera Sverige AB v Konkurrensverket

Principle: Margin squeeze is an independent form of abusive conduct under Article 102 TFEU and does not necessarily require all conditions applicable to refusal-to-supply cases.

Methodological importance: Emphasised assessment of the economic circumstances and competitive effects rather than an inflexible formula.

3. Telefónica v European Commission

Principle: Telecommunications margin squeeze analysis requires detailed assessment of wholesale prices, retail prices and downstream costs over the relevant period.

Methodological importance: Demonstrates the importance of longitudinal cost and price analysis.

4. Slovak Telekom v European Commission

Principle: Wholesale access pricing and downstream competitive conditions can produce an abusive margin squeeze where effective competition is foreclosed.

Methodological importance: Particularly important for vertically integrated network industries and the relationship between access obligations and price structure.

5. Bronner v Mediaprint

Principle: Essential-facilities/refusal-to-supply doctrine has demanding conditions concerning indispensability and elimination of competition.

Methodological importance: Helps distinguish a margin-squeeze case from a case requiring compulsory access in the first place.

6. Post Danmark II

Principle: Cost-based economic analysis is important in determining whether pricing practices can produce exclusionary effects.

Methodological importance: Particularly relevant to rebate/discount components that can alter the effective downstream price used in a margin calculation.

41. Additional Important Authorities

Other cases that help develop the broader methodology include:

Michelin II

Relevant to economic assessment of loyalty-inducing pricing and rebates.

AKZO

Important for cost-based pricing analysis, particularly the relationship between price and variable/avoidable costs.

Wanadoo

Important for the economics of exclusionary pricing and cost recovery.

Google Shopping

Important for understanding why complex digital-platform conduct may require more than a simple price-cost test.

42. A Practical Calculation Framework

A competition authority investigating a suspected squeeze can proceed as follows:

Step 1 — Define the upstream market

Identify the input controlled by the vertically integrated undertaking.

Step 2 — Define the downstream market

Identify the product or service in which competitors are allegedly being squeezed.

Step 3 — Identify the relevant prices

Determine:

Pu,PdP_u,\quad P_d

Step 4 — Convert nominal prices into effective prices

Account for:

• rebates;
• discounts;
• credits;
• commissions;
• mandatory fees;
• bundles.

Step 5 — Select the cost benchmark

Possible benchmarks include:

• AVC;
• AAC;
• LRAIC;
• ATC;
• dominant firm's costs;
• equally efficient competitor's costs.

Step 6 — Calculate the margin

M=Pd−PuM=P_d-P_u

Step 7 — Compare with downstream cost

S=Pd−Pu−CdS=P_d-P_u-C_d

Step 8 — Conduct sensitivity analysis

Test alternative assumptions.

Step 9 — Examine duration

Determine whether the squeeze is:

• isolated;
• recurring;
• persistent;
• worsening.

Step 10 — Assess competitive effects

Examine:

• foreclosure;
• exit;
• reduced entry;
• investment;
• innovation;
• consumer harm.

43. Margin Squeeze vs Predatory Pricing

These concepts should not be confused.

Thus:

Margin Squeeze=(Pd−Pu)<CdMargin\ Squeeze=(P_d-P_u)<C_d

whereas predatory pricing broadly asks whether:

Pd<CrelevantP_d<C_{relevant} 

44. Margin Squeeze and Refusal to Deal

A refusal-to-deal case asks:

Must the dominant firm supply the input?

A margin-squeeze case asks:

Having supplied or made the input available, has the dominant firm priced the upstream and downstream stages so that effective competition is undermined?

This distinction is crucial.

45. Margin Squeeze in Digital Platforms

The methodology becomes substantially more complex where the platform does not charge a conventional monetary price.

For example:

Users → data → advertising → ranking → merchant access

The economic margin may need to incorporate:

• advertising revenue;
• commissions;
• data value;
• access fees;
• ranking benefits;
• traffic;
• API restrictions;
• quality-adjusted prices.

A useful conceptual formula is:

Economic Margin=Effective Downstream Revenue−Effective Upstream Access Cost−Incremental Downstream CostEconomic\ Margin= Effective\ Downstream\ Revenue - Effective\ Upstream\ Access\ Cost - Incremental\ Downstream\ Cost

This makes margin-squeeze methodology particularly important for digital ecosystems.

46. Key Legal Principle

The central lesson from the case law is that margin squeeze is not simply an accounting exercise.

A negative calculated margin is strong evidence of competitive difficulty, but the authority must still examine the relevant legal and economic context.

Conversely, a positive accounting margin does not necessarily end the inquiry if:

• costs have been incorrectly allocated;
• rebates have been ignored;
• access restrictions create hidden costs;
• bundling obscures the effective price;
• quality or non-price terms materially alter competition.

47. Conclusion

Margin-squeeze calculation methodology can be reduced to a core equation:

Pd−Pu−Cd\boxed{P_d-P_u-C_d}

But sophisticated competition-law analysis requires much more than this formula.

The investigator must determine which prices, which costs, which competitor, which period and which counterfactual should be used.

The principal methodologies are:

1. Price-spread analysis
2. AAC/AAC-type cost tests
3. LRAIC
4. ATC
5. Dominant-firm cost test
6. Equally efficient competitor test
7. Effective-price analysis
8. Bundled-product allocation
9. Time-series analysis
10. NPV/dynamic analysis
11. Customer-segment analysis
12. Sensitivity and counterfactual analysis

The most important authorities—Deutsche Telekom, TeliaSonera, Telefónica and Slovak Telekom—show that the central issue is whether the vertically integrated dominant undertaking has left sufficient economic space between its upstream and downstream prices for effective competition to survive.