Determining the Relevant Market – Secs. 4(k) and 24

Relevant Market in Competition Analysis

The relevant market is the field within which competitive pressure is measured. It identifies the goods or services that discipline each other and the geographic area within which buyers and sellers realistically interact. Without a properly defined relevant market, an assessment of market power, dominance, foreclosure, entry, substitution, and competitive harm becomes either overbroad or artificially narrow.

Under Section 4(k) of the Philippine Competition Act, the relevant market combines two dimensions: the relevant product market and the relevant geographic market. The product market asks what goods or services are interchangeable or substitutable from the viewpoint of customers, considering characteristics, prices, and intended use. The geographic market asks where the conditions of competition are sufficiently homogeneous, and where those conditions are distinguishable from neighboring areas.

Market definition is therefore not a mere labeling exercise. It is an economic and legal inquiry into competitive constraints. The controlling question is whether buyers would treat other goods, services, suppliers, or places as practical alternatives if the firm under review changed price, quality, output, access, or other competitive terms.

Function of the Relevant Market

The relevant market gives context to conduct. A firm may look large in a narrow commercial description but face strong competitive pressure from substitutes; conversely, a firm may appear modest in a broad industry description but possess substantial power over a specific product, location, customer group, or channel.

The relevant market is especially important in assessing abuse of dominant position, because dominance can exist only in relation to a market where the entity can behave to an appreciable extent independently of competitors, customers, suppliers, or consumers. It is also central to merger review, because concentration, entry, countervailing buyer power, and unilateral or coordinated effects are meaningful only after identifying the market affected by the transaction.

In agreements analysis, market definition may be less central for conduct that is unlawful by its nature, but it remains important when the inquiry depends on competitive effects, market coverage, foreclosure, restraints on trade, or the practical ability of parties to harm competition.

Relevant Product Market

The relevant product market consists of goods or services regarded as interchangeable or substitutable by customers. The analysis focuses on practical substitution, not abstract similarity. Two products may be physically different yet compete closely if customers use them for the same purpose at comparable prices; two products may look similar yet belong to different markets if customers do not regard them as workable alternatives.

The main inquiry is demand substitution. If a supplier worsens competitive terms, the question is whether enough customers would switch to another good or service so that the change would be unprofitable or unsustainable. The more likely, timely, and substantial the switching response, the more likely the alternative belongs in the same product market.

Product characteristics matter because they define functionality, quality, durability, compatibility, safety, reliability, brand attributes, and regulatory suitability. A substitute must satisfy the buyer's commercial need, not merely share a general category name. For example, a medicine, industrial input, payment channel, transport service, or digital platform may have technical features that make switching impractical despite surface similarity.

Price matters because substitution must be commercially realistic. A higher-priced product may constrain a lower-priced product only if buyers would actually switch despite the price gap. A cheaper product may fail to constrain a premium product if buyers value quality, brand assurance, after-sales support, certification, or compatibility in a way that prevents meaningful substitution.

Intended use matters because customers usually compare products by the purpose for which they buy them. A product used for household consumption, professional use, industrial processing, resale, infrastructure, or regulatory compliance may face different competitive constraints even if it shares components or suppliers with other products.

Supply-side substitution may also inform the analysis when suppliers outside the candidate market can quickly and credibly shift production or supply to the product in question without substantial sunk cost, regulatory delay, or commercial risk. Supply responses that require major investment, new approvals, specialized equipment, distribution networks, or long lead times normally do not discipline current market power in the same way as existing suppliers.

Relevant Geographic Market

The relevant geographic market is the area where the entity supplies or demands goods or services under sufficiently homogeneous competitive conditions. The area must be broad enough to include realistic sources of supply and demand, but narrow enough to exclude places where competitive conditions are materially different.

Geographic market definition depends on actual commercial reach. National, regional, provincial, city, port, route, online, facility-based, or even location-specific markets may exist depending on transportation costs, delivery time, customer willingness to travel, regulatory restrictions, language, infrastructure, after-sales service, perishability, and the need for immediate or reliable supply.

A national geographic market is appropriate when customers across the Philippines face similar prices, suppliers, access conditions, and regulatory constraints. A local market is appropriate when customers cannot practicably obtain the product elsewhere because of distance, urgency, logistics cost, local licensing, limited delivery capacity, or strong preference for nearby suppliers.

Foreign suppliers may be included in the geographic market only when imports are a real competitive constraint. The mere theoretical possibility of importation is insufficient if freight, insurance, tariffs, non-tariff measures, customs delays, minimum order quantities, certification, after-sales support, currency risk, or procurement timelines prevent timely substitution.

Section 24 Factors

Section 24 directs the competition authority to consider factors affecting substitutability among goods or services and the geographic boundaries of the market. The list is not closed; it identifies the kinds of evidence that show whether alternatives are practical, timely, and commercially meaningful.

The statutory factors emphasize real substitution. Competition law is concerned with alternatives that buyers or suppliers can actually use within a relevant period, not alternatives that exist only in theory, at prohibitive cost, or after the competitive harm has already occurred.

Demand Substitution

Demand substitution is usually the starting point because market power is constrained primarily by the choices of customers. A product belongs in the same relevant market when enough customers would switch to it in response to a small but significant worsening of competitive terms by the firm under review.

Evidence of demand substitution includes current purchasing patterns, past switching behavior, customer testimony, price movements, cross-price effects, bidding records, lost sales, procurement specifications, product comparisons, usage data, and internal business documents showing which competitors are monitored by the firm.

Customer groups may justify distinct markets when different buyers have different substitution options. A retail customer, government procuring entity, industrial buyer, hospital, small enterprise, platform user, or reseller may face different prices, contracts, switching costs, and access conditions. Separate markets may arise when a supplier can distinguish among customer groups and impose different competitive terms on them.

Brand loyalty does not automatically create a separate market, but it may narrow substitution when loyalty is strong enough to reduce switching in response to price or quality changes. Conversely, mere brand preference does not exclude competing brands when customers still treat them as meaningful alternatives.

Switching costs are central. Contract lock-ins, interoperability limits, data migration costs, training requirements, termination penalties, specialized equipment, regulatory qualification, and loss of network benefits may prevent customers from responding quickly to worse terms. High switching costs may narrow the relevant market even where alternative suppliers exist.

Supply Substitution and Entry

Supply substitution asks whether firms not currently supplying the product can shift to it promptly and profitably. It is strongest when suppliers already possess the necessary assets, technology, inputs, licenses, distribution channels, customer relationships, and capacity.

Supply substitution differs from entry. Supply substitution may affect market definition when the shift is quick and does not require substantial sunk investment. Entry is usually assessed later as a competitive constraint when firms can enter only after significant time, investment, regulatory approval, or commercial repositioning.

A producer with flexible manufacturing capacity may constrain current suppliers if it can switch output rapidly. A firm that needs a new plant, imported equipment, permits, clinical approval, spectrum, franchise, accreditation, or large-scale customer acquisition is more properly considered as a potential entrant rather than part of the existing market.

Practical Boundaries of the Product Market

The product market may be broad when customers choose among multiple technologies or business models to satisfy the same need. It may be narrow when regulation, technical standards, safety requirements, procurement specifications, or compatibility limits make substitution impractical.

Products sold as bundles require careful treatment. A bundle may be the relevant product when customers demand the package as a unit and cannot conveniently assemble components from different suppliers. Separate component markets may exist when customers commonly buy the components independently and suppliers compete separately for each component.

Aftermarkets may be relevant when customers are locked into a primary product and must purchase spare parts, consumables, maintenance, software updates, or repair services from a limited set of suppliers. The aftermarket analysis turns on whether customers anticipated lifecycle costs at the time of the primary purchase and whether they can discipline aftermarket pricing by switching away from the primary product.

Digital and platform markets may require attention to multi-sided demand. A platform may serve users on different sides, such as consumers and merchants, drivers and riders, advertisers and viewers, or developers and end-users. The relevant market may need to reflect indirect network effects, pricing on each side, data advantages, switching costs, interoperability, and the ability of users to multi-home.

Free services can still form a relevant market. Competition may occur through quality, privacy, data access, attention, innovation, ranking, speed, reliability, or monetization on another side of the platform. A zero monetary price does not eliminate market definition if users exchange data, attention, content, or access for the service.

Practical Boundaries of the Geographic Market

Geographic boundaries are shaped by whether customers can realistically obtain the product from another area and whether suppliers from that area can serve customers on competitive terms. The relevant area may be smaller than the Philippines when logistics, local permits, service response time, or customer travel costs matter.

Transportation costs are decisive when they represent a material part of the delivered price. Heavy, bulky, perishable, hazardous, or low-value goods often have narrow geographic markets because distance quickly erodes price competitiveness. High-value, standardized, and easily shipped goods more often face broader geographic competition.

Regulatory barriers may create distinct geographic markets. Local franchises, port access rules, zoning, professional licensing, import permits, product registration, procurement eligibility, foreign ownership restrictions, and local government requirements can prevent outside suppliers from serving buyers even when they are geographically close.

Service markets often depend on presence, response time, and relationship-specific capacity. A hospital, repair provider, logistics operator, school, utility, terminal, or professional service provider may face local competitive constraints because customers value proximity, continuity, emergency availability, or on-site performance.

Online supply does not automatically make the market national or global. Delivery coverage, payment access, fulfillment reliability, return policies, language, consumer trust, regulatory compliance, and platform rules may still segment geographic competition.

Homogeneous Conditions of Competition

The geographic market exists where competitive conditions are sufficiently homogeneous. Homogeneity does not require identical prices or identical suppliers everywhere; it requires that competitive constraints operate in broadly similar ways across the area.

Indicators of homogeneous conditions include similar price levels, overlapping suppliers, common distribution channels, comparable customer options, similar regulatory requirements, aligned promotional strategies, and frequent cross-area customer switching. Materially different prices, limited supplier overlap, distinct local barriers, and weak arbitrage may justify separate geographic markets.

Arbitrage matters because it can link areas. If buyers or intermediaries can buy in a low-price area and resell or consume in a high-price area without prohibitive cost or restriction, the areas may belong to the same geographic market. If arbitrage is blocked by transport cost, contract limits, regulation, perishability, or timing, the areas may remain separate.

Temporal and Dynamic Considerations

The relevant market is assessed in relation to the conduct, transaction, or period under review. Temporary shortages, seasonal demand, procurement cycles, crop seasons, calamities, supply disruptions, and regulatory transitions may affect substitutability and geographic reach.

A short-run market may be narrower when customers need immediate supply and cannot wait for distant suppliers, new production, or regulatory approval. A longer-run market may be broader when customers can plan, import, redesign, rebid, or qualify alternative suppliers.

Innovation markets and rapidly changing technology require a forward-looking assessment. Existing sales may understate competitive constraints where products are converging, but speculative future competition should not be used to broaden a market unless entry, expansion, or substitution is timely and likely.

Evidence Used in Market Definition

Market definition relies on evidence rather than labels used by firms. Industry categories, accounting classifications, product names, or marketing descriptions may be relevant, but they do not control the legal analysis if customer behavior shows different substitution patterns.

• Customer evidence shows what buyers consider alternatives, how they respond to price or quality changes, and what prevents them from switching.
• Supplier evidence shows which rivals are monitored, which products constrain pricing, and whether expansion or switching of production is commercially feasible.
• Price evidence shows whether products or areas move together, whether price differences persist, and whether arbitrage links separate locations.
• Procurement evidence shows who participates in bids, which suppliers are qualified, and how buyers define acceptable substitutes.
• Operational evidence shows logistics limits, capacity constraints, delivery lead times, input dependence, technical compatibility, and regulatory requirements.

Internal documents are often probative because firms commonly identify their closest competitors, strategic threats, customer switching risks, and geographic expansion limits in ordinary business planning. However, such documents must be read with market realities, because marketing claims and strategic language may exaggerate or understate actual competitive constraints.

Relationship to Market Power

Defining the relevant market does not by itself prove market power. It creates the frame within which market shares, entry barriers, buyer power, capacity, switching costs, access to inputs, control of infrastructure, network effects, and competitive behavior are assessed.

A high market share in a properly defined market may indicate market power, but it is not conclusive if entry is easy, customers can sponsor new entry, capacity is abundant, or rivals can expand quickly. A low market share usually weakens an inference of dominance, but special circumstances such as control over a bottleneck facility, essential data, key technology, or indispensable distribution channel may still matter.

Market shares must correspond to the defined market. Shares calculated from an overbroad market may conceal power; shares calculated from an artificially narrow market may exaggerate it. The chosen measure of share should match the competitive issue, such as sales value, sales volume, capacity, reserves, transactions, users, traffic, bids won, or access points.

Errors in Market Definition

A market is too narrow when it excludes products, services, or areas that customers would readily use as substitutes. This error can create an appearance of dominance where competitive discipline actually exists.

A market is too broad when it includes alternatives that customers cannot practically use because of price, function, access, timing, regulation, switching costs, or geography. This error can hide market power and understate competitive harm.

The correct market is not necessarily the smallest conceivable product group or the largest industry category. It is the set of products and places that impose meaningful competitive constraints under the circumstances of the conduct or transaction being evaluated.

Integrated Application

The relevant market inquiry begins with the product or service directly affected by the conduct or transaction, then tests whether customers would switch to alternatives in sufficient numbers and within a relevant time. If substitution is practical, the candidate market expands; if substitution is costly, delayed, or unlikely, the market remains narrower.

The same process applies geographically. The inquiry starts with the area where the entity supplies or demands the product, then asks whether customers would turn to other areas or whether suppliers from other areas would serve them on competitive terms. The market expands only to areas that impose real competitive discipline.

The product and geographic dimensions must be read together. A product may face national competition in one form but local competition in another; a service may be substitutable in Metro Manila but not in an island province; an imported product may discipline domestic supply in ordinary periods but not during port congestion, foreign export restrictions, or urgent procurement cycles.

Relevant market determination under Sections 4(k) and 24 is ultimately a disciplined inquiry into substitutability. The legal definition supplies the structure, the statutory factors identify the evidence, and the competition analysis asks whether the alternatives included in the market are capable of restraining the conduct, power, or transaction being examined.