Competition Law and Market Concentration in Interconnected Industries

1. Introduction

Market concentration in interconnected industries arises where a firm operates across several related or vertically connected markets—such as operating systems and app stores, cloud computing and AI, e-commerce and logistics, payment systems and digital platforms, pharmaceuticals and diagnostics, or telecommunications and digital services.

Traditional competition analysis often examines one relevant market at a time. Interconnected industries require a broader analysis because market power in one market can be transferred, leveraged, reinforced, or protected in another market.

The principal competition concerns include:

• vertical foreclosure;
• conglomerate leveraging;
• tying and bundling;
• self-preferencing;
• interoperability restrictions;
• control over essential inputs;
• network effects;
• switching costs;
• data advantages;
• cross-subsidisation;
• common ownership;
• ecosystem lock-in;
• strategic acquisitions of firms in adjacent markets; and
• cumulative concentration across several connected markets.

Under Indian law, the Competition Act, 2002 addresses anti-competitive agreements, abuse of dominant position and combinations. CCI expressly recognises that vertical arrangements can involve enterprises operating at different stages of the production chain and that combinations must be assessed for their effect on competition.

2. Meaning of Interconnected Industries

Industries are interconnected when competition in one market materially affects competition in another.

For example:

Mobile operating system → App store → Mobile payments → Advertising → Search → Cloud → AI services

A company may therefore possess separate market positions that are commercially interconnected.

Similarly:

E-commerce platform → Marketplace sellers → Logistics → Warehousing → Payments → Advertising

A concentration problem may arise even where each individual market appears contestable because control over several layers may collectively create substantial strategic power.

Key distinction

Market concentration is not automatically unlawful.

A highly concentrated market may result from:

• economies of scale;
• innovation;
• superior products;
• network effects;
• efficiency;
• consumer preference; or
• legitimate business expansion.

Competition law becomes concerned where concentration creates or strengthens market power and that power is capable of being exercised to restrict competition.

3. Legal Framework

A. India

The principal provisions are:

Section 3 — Anti-competitive agreements

Section 3 addresses agreements causing or likely to cause an appreciable adverse effect on competition.

Interconnected-industry problems may involve:

• tying;
• exclusive supply;
• exclusive distribution;
• refusal to deal;
• resale restrictions;
• information exchange;
• platform restrictions.

Section 4 — Abuse of dominant position

Section 4 becomes particularly important where a concentrated firm uses power in one market to affect another.

Relevant forms of conduct include:

• unfair or discriminatory conditions;
• denial of market access;
• leveraging;
• tying;
• predatory conduct;
• discriminatory access to infrastructure or data.

Sections 5 and 6 — Combinations

Mergers and acquisitions involving interconnected markets may raise:

• horizontal concerns;
• vertical concerns;
• conglomerate concerns;
• foreclosure concerns;
• data-related concerns;
• ecosystem concentration concerns.

CCI's published guidance confirms that multiple formally separate transactions can constitute a single composite combination when they are interconnected steps intended to achieve the same ultimate effect.

4. Why Interconnected Industries Create Special Competition Risks

4.1 Vertical foreclosure

A company controlling an upstream input may disadvantage downstream competitors.

Example:

Cloud infrastructure → AI model → AI application

If one firm controls the cloud infrastructure and also competes in AI applications, it may have an incentive to restrict or disadvantage competing AI developers.

4.2 Conglomerate leveraging

A firm dominant in Market A may use that position to obtain advantages in Market B.

For example:

Dominant operating system + dominant app store + dominant advertising service.

The individual markets may be distinct, but their commercial relationship can strengthen the firm's overall ecosystem.

4.3 Tying and bundling

A firm can make access to one product conditional upon purchasing another.

Examples include:

• operating system + search;
• software + cloud;
• payment service + marketplace;
• hardware + proprietary software;
• advertising service + analytics.

The competition concern is whether bundling forecloses competitors in the tied market.

4.4 Network effects

Interconnected markets frequently exhibit strong network effects.

The basic cycle can be:

More users → more data → better service → more users → more developers → more complementary products → stronger ecosystem

Once established, this can make entry substantially more difficult.

4.5 Switching costs

Interconnected ecosystems can make consumers and businesses dependent upon a combination of products.

Switching may require:

• migrating data;
• retraining employees;
• changing software;
• changing hardware;
• rebuilding customer relationships;
• abandoning accumulated reputation;
• changing payment systems.

Consequently, even where a nominal alternative exists, competitive pressure may remain weak.

5. Relevant Market Definition

Market definition becomes particularly important.

Authorities may examine:

Product markets

Whether products are:

• substitutes;
• complements;
• vertically connected;
• technologically dependent.

Geographic markets

Whether competition occurs:

• nationally;
• regionally;
• globally;
• through digital platforms.

Functional layers

In digital or industrial ecosystems, markets may exist at different layers:

Infrastructure
↓
Platform
↓
Application
↓
Distribution
↓
Consumer service

The analysis should therefore avoid assuming that the entire ecosystem is one market.

6. Six Major Case Laws

Case 1: United States v. Microsoft Corp.

United States, D.C. Circuit, 2001

Facts

Microsoft possessed a dominant position in PC operating systems. The government challenged Microsoft's conduct involving Internet Explorer and browser distribution.

Competition issue

The important issue was whether Microsoft could use power in the operating-system market to protect its position against an emerging complementary technology.

Principle

The case demonstrates the importance of analysing interconnected markets and platform relationships.

Control of one layer of technology can give a firm strategic advantages over competition in an adjacent layer.

Significance

The case is particularly relevant to:

• platform ecosystems;
• tying;
• technological foreclosure;
• leveraging;
• network effects;
• adjacent-market competition.

It demonstrates why competition authorities cannot always analyse a dominant market in isolation.

Case 2: GE/Honeywell

European Commission, 2001; General Court, 2005

The proposed merger between General Electric and Honeywell involved businesses operating in closely connected aerospace markets.

Competition issue

The Commission examined whether the combination could produce significant conglomerate and vertical effects.

The concern extended beyond simple horizontal overlap because the parties possessed complementary positions across aerospace products.

Key principle

Competition authorities may consider whether a firm possessing strong positions in connected markets can use those positions collectively to disadvantage rivals.

The case is historically important for the analysis of:

• conglomerate effects;
• portfolio power;
• vertical integration;
• bundling;
• complementary products.

Significance

GE/Honeywell illustrates that a transaction can raise competition concerns even where the principal problem is not simply an increase in concentration in a single market.

Case 3: Tetra Laval/Sidel

European Commission / Court of Justice of the European Union

Tetra Laval was active in packaging systems and sought to acquire Sidel, another packaging business.

Competition issue

The case concerned the possibility that a firm with a strong position in one packaging technology could leverage that position into another connected market.

Principle

The European courts examined the evidentiary requirements for conglomerate theories of harm.

The case is especially important because it demonstrates that conglomerate effects cannot be assumed merely because a firm becomes larger.

An authority must establish a sufficiently supported theory explaining:

1. the firm's existing market power;
2. the mechanism of leveraging;
3. the firm's incentive;
4. the ability to engage in the conduct; and
5. the likely effect on competition.

Significance

Tetra Laval is therefore important for balancing:

legitimate diversification

against

anti-competitive ecosystem expansion.

Case 4: Google Android

Competition Commission of India, Case No. 39/2018, order dated 20 October 2022

This is particularly important for interconnected digital markets in India.

CCI examined Google's conduct concerning Android mobile devices and several connected markets.

CCI found Google dominant in multiple relevant markets and considered the combined effects of agreements governing Android and Google's proprietary applications.

Competition issue

The case involved relationships between:

• Android operating systems;
• app stores;
• search services;
• mobile applications;
• advertising;
• OEM distribution.

Principle

A firm can reinforce its position across interconnected markets through contractual and technological arrangements.

CCI's analysis considered how Google's agreements could contribute to network effects and foreclosure of competing services.

Significance

The case illustrates the ecosystem theory of competition:

Operating-system power → application-distribution power → search advantage → data → advertising advantage → stronger ecosystem.

Thus, market concentration cannot necessarily be assessed by looking at the operating-system market alone.

Case 5: Amazon.com NV Investment Holdings / Future Coupons

Competition Commission of India / Supreme Court of India

This matter demonstrates the importance of interconnected transactions and strategic investments.

CCI's framework recognises that a series of transactions can constitute a single composite combination where the transactions are interconnected and directed toward the same ultimate objective. The Supreme Court addressed this principle in CCI v. Thomas Cook (India) Ltd., holding that interconnected transactions could be assessed collectively rather than artificially separated.

The Amazon/Future matter subsequently generated significant litigation concerning CCI's combination-related process, with the Supreme Court's Amazon judgment listed by CCI as dated 27 May 2026.

Significance for interconnected industries

The broader competition-law lesson is that an acquisition strategy cannot necessarily be understood by analysing each legal or financial step independently.

This is particularly relevant to:

• digital ecosystems;
• minority investments;
• strategic rights;
• platform investments;
• retail;
• logistics;
• payments;
• data-driven businesses.

Case 6: Illumina/GRAIL

European Commission / Court of Justice of the European Union, Joined Cases C-611/22 P and C-625/22 P

Illumina sought to acquire GRAIL, a company developing blood tests for early cancer detection.

Illumina was active in genetic sequencing, while GRAIL was developing downstream diagnostic applications.

The transaction therefore involved connected technological markets rather than straightforward horizontal overlap.

The CJEU's 3 September 2024 judgment concerned the European Commission's jurisdiction to examine the transaction following an Article 22 referral.

Competition significance

The case demonstrates the importance of examining acquisitions involving:

• upstream technology;
• downstream applications;
• innovation;
• nascent markets;
• potential competitors;
• technological ecosystems.

Important lesson

A transaction involving a relatively small or emerging downstream company can attract competition scrutiny when the target occupies a strategically important position within a broader technological chain.

The case therefore illustrates the increasing importance of innovation competition and ecosystem relationships, rather than merely present-day market shares.

7. Additional Important Case: Google Search/Vertical Search

The European Commission's Google Shopping decision is another major example of interconnected-market competition.

Google operated the dominant general search engine while also providing comparison-shopping services.

The competition concern was not simply Google's share in search. It concerned the interaction between:

General search → search ranking → traffic → comparison shopping → advertising/commerce.

The case illustrates how control over an upstream gateway can influence competition in downstream markets.

8. Market Concentration Through Ecosystem Effects

A useful analytical model is:

Stage 1 — Initial concentration

A company obtains substantial market power in Market A.

Stage 2 — Expansion

It enters an adjacent Market B.

Stage 3 — Integration

The firm connects A and B through:

• technical integration;
• contractual arrangements;
• data;
• APIs;
• pricing;
• default settings.

Stage 4 — Reinforcement

Market A strengthens Market B and vice versa.

Stage 5 — Entry barriers

Competitors must enter several markets simultaneously.

Stage 6 — Ecosystem concentration

The firm becomes difficult to challenge even if competitors technically remain present.

9. Types of Interconnected-Industry Concentration

10. Measuring Market Concentration

Traditional measures remain relevant.

Herfindahl-Hirschman Index

HHI=∑si2HHI = \sum s_i^2

where sis_i represents each firm's market share.

For example, if four firms have:

• 40%;
• 30%;
• 20%;
• 10%,

then:

HHI=402+302+202+102HHI = 40^2+30^2+20^2+10^2 =1600+900+400+100=1600+900+400+100 =3000=3000

However, in interconnected industries, HHI alone may not capture the full competition problem.

Authorities may also consider:

• control of infrastructure;
• interoperability;
• data;
• switching costs;
• network effects;
• entry barriers;
• ecosystem dependency;
• multi-homing;
• vertical integration;
• access to customers;
• innovation;
• control of standards.

11. The "Gateway" Problem

One of the most important concepts is gateway power.

A firm may not dominate every downstream market but may control the gateway through which competitors must reach customers.

Examples:

Mobile

OS → App store → Consumer

E-commerce

Marketplace → Seller visibility → Consumer

Cloud

Cloud infrastructure → AI applications → Enterprise customers

Payments

Payment infrastructure → Merchant → Consumer

Advertising

Search/social platform → Data → Advertising → Publisher

The gateway can therefore create strategic power across multiple markets.

12. Interoperability and Competition

Interoperability can substantially affect concentration.

A dominant firm may restrict:

• API access;
• data portability;
• technical compatibility;
• cross-platform functionality;
• messaging interoperability;
• payment interoperability.

If competitors cannot interoperate effectively, users may become locked into the dominant ecosystem.

Thus:

Interoperability failure + network effects + switching costs = increased ecosystem concentration

13. Data as a Concentration Mechanism

Data can strengthen interconnected-market power.

For example:

Marketplace data

↓

Consumer behaviour

↓

Advertising optimisation

↓

Better targeting

↓

More advertisers

↓

More revenue

↓

More investment in marketplace

This produces a data-network feedback loop.

Competition authorities therefore increasingly examine whether a concentration provides a firm with unique or difficult-to-replicate data advantages.

14. Innovation Competition

Interconnected industries also create risks to future competition.

A large incumbent may acquire:

• a start-up;
• a potential competitor;
• an important supplier;
• an emerging technology;
• a complementary application.

The relevant question may therefore be:

Will the transaction remove a future competitive constraint?

This is particularly important in:

• biotechnology;
• AI;
• cloud computing;
• semiconductors;
• digital platforms;
• fintech;
• telecommunications.

The Illumina/GRAIL litigation demonstrates how acquisitions involving emerging technologies can raise competition-law issues extending beyond current market shares.

15. Indian Competition-Law Application

India's competition framework is particularly relevant to interconnected digital and industrial ecosystems.

The CCI's Google Android decision demonstrates how multiple agreements and services can interact across several relevant markets.

The CCI has also expressly recognised that multiple transactions may constitute interconnected steps of one combination.

This is important because parties cannot necessarily avoid scrutiny by dividing a strategic transaction into multiple formally separate arrangements.

16. Defences and Efficiency Considerations

Interconnected business structures are not inherently unlawful.

A firm may demonstrate legitimate reasons such as:

Economies of scale

Integration may reduce production costs.

Economies of scope

Producing complementary services together may be cheaper.

Innovation

Integration may facilitate research and development.

Security

Vertical integration may improve cybersecurity.

Quality control

Common ownership may ensure compatibility.

Consumer benefits

Integration may produce:

• lower prices;
• improved services;
• faster innovation;
• better interoperability;
• improved reliability.

Therefore, competition law should distinguish efficient integration from strategic foreclosure.

17. Remedies

Where interconnected concentration creates competition concerns, possible remedies include:

Structural remedies

• divestiture;
• sale of business units;
• separation of assets.

Behavioural remedies

• non-discrimination obligations;
• access obligations;
• interoperability;
• API access;
• data portability;
• prohibition of tying;
• restrictions on self-preferencing.

Merger remedies

• divestiture commitments;
• licensing;
• firewall arrangements;
• supply commitments;
• access commitments.

Digital remedies

• interoperability;
• choice screens;
• data portability;
• restrictions on default settings;
• transparent ranking;
• restrictions on combining datasets.

18. Competition-Law Test for Interconnected Industries

A useful examination framework is:

Step 1 — Identify all relevant markets

Do not automatically treat the ecosystem as a single market.

Step 2 — Identify the firm's position in each market

Examine:

• market shares;
• barriers;
• network effects;
• infrastructure;
• data;
• switching costs.

Step 3 — Identify the connections

Ask how Market A affects Market B.

Step 4 — Identify the leveraging mechanism

Possible mechanisms:

• tying;
• bundling;
• self-preferencing;
• exclusive dealing;
• discriminatory access;
• refusal to deal;
• interoperability restrictions.

Step 5 — Analyse foreclosure

Ask:

Can rivals effectively compete without access to the interconnected ecosystem?

Step 6 — Analyse countervailing factors

Consider:

• efficiencies;
• innovation;
• consumer benefits;
• entry;
• multi-homing;
• alternative technologies.

Step 7 — Assess long-term effects

Consider not merely current prices but:

• innovation;
• quality;
• choice;
• entry;
• technological development.

19. Comparative Case-Law Principles

20. Conclusion

Market concentration in interconnected industries requires competition analysis beyond simple market-share calculations.

The central issue is not merely:

"How concentrated is Market A?"

It is increasingly:

"How does control over Market A interact with control over Markets B, C and D?"

The most important risks arise when a firm combines:

Market power + network effects + data + infrastructure + interoperability control + switching costs + adjacent-market expansion.

The case law from Microsoft, GE/Honeywell, Tetra Laval/Sidel, Google Android, Amazon/Future-related proceedings and Illumina/GRAIL demonstrates different dimensions of this problem.

For Indian competition law, the combination of Sections 3, 4, 5 and 6 of the Competition Act, 2002, together with CCI's approach to interconnected transactions and ecosystem-based conduct, provides the principal framework for analysing these situations. CCI's published materials specifically recognise that multiple interconnected transactions can be assessed as a composite combination rather than artificially isolated transactions.