Joint Purchasing Competition Concerns

1. Introduction

Joint purchasing occurs when two or more businesses combine some or all of their purchasing requirements and negotiate collectively with suppliers. The arrangement may involve a purchasing consortium, buying group, jointly controlled purchasing company, central purchasing agency, or contractual purchasing alliance.

Joint purchasing is not inherently anti-competitive. It can create substantial efficiencies through:

• volume discounts;
• reduced transaction and procurement costs;
• improved bargaining power;
• lower logistics and distribution costs;
• better quality or supply terms;
• access to suppliers that individual firms could not efficiently negotiate with.

The competition concern arises when purchasing cooperation becomes a mechanism for buyer-side collusion, monopsony power, downstream coordination, exclusion of suppliers, or exchange of competitively sensitive information. The European Commission specifically distinguishes legitimate joint purchasing from buyer cartels and examines both the purchasing market and the downstream selling markets.

2. Meaning of Joint Purchasing

A joint purchasing arrangement may take several forms:

1. Joint negotiation – competitors jointly negotiate price or supply conditions but purchase individually.
2. Central purchasing agency – an independent entity negotiates or purchases on behalf of members.
3. Purchasing cooperative – members jointly own and operate the purchasing entity.
4. Buying group – businesses aggregate demand to obtain better commercial terms.
5. Joint procurement platform – purchases are coordinated through a digital or electronic platform.
6. Full purchasing integration – members transfer substantial purchasing functions to a common entity.

The legal characterization is important because an arrangement that genuinely aggregates purchasing demand may receive different treatment from an agreement under which competitors simply agree on the prices they will offer to suppliers.

3. Why Joint Purchasing Can Be Pro-Competitive

Joint purchasing can produce genuine efficiencies.

A. Economies of scale

Several buyers can aggregate their orders and obtain discounts that would not be available to individual purchasers.

B. Lower transaction costs

Instead of each company separately negotiating contracts, the purchasing organization can negotiate one framework agreement.

C. Improved supplier competition

A coordinated purchasing group may make it commercially viable for smaller or new suppliers to compete for large contracts.

D. Lower downstream prices

If purchasing savings are passed on, consumers may benefit from lower prices.

E. Better quality and innovation

Larger purchasing volumes can support standardized quality requirements and encourage suppliers to invest in improved products.

The European Commission recognizes that joint purchasing can increase bargaining power and lead to better prices and conditions, while emphasizing that the effects must be assessed in their economic context.

4. Principal Competition Concerns

A. Buyer Cartel / Monopsony

The most serious concern is that competitors use a purchasing arrangement to fix the price they will pay suppliers.

For example:

Five competing manufacturers agree that none will pay more than ₹100 per unit for a particular raw material.

Although the agreement operates on the purchasing side, it can constitute a cartel.

The distinction is therefore:

Joint purchasing:

"We will combine demand and negotiate collectively."

Buyer cartel:

"We will coordinate the price or purchasing terms that each of us will offer."

The European Commission's Ethylene Purchasers case illustrates this distinction particularly clearly. The Commission found coordination among purchasers concerning price targets and the ethylene monthly contract price, treating the conduct as a restriction by object.

5. Downstream Price Coordination

Joint purchasing can also facilitate collusion in the sellers' downstream market.

Suppose competing supermarkets jointly negotiate with manufacturers. During those negotiations they begin exchanging:

• future retail prices;
• promotional plans;
• margins;
• product launches;
• sales forecasts;
• store expansion plans.

The purchasing arrangement may then become a vehicle for downstream coordination.

This is particularly important because the participants may be competitors both:

upstream as buyers and
downstream as sellers.

The EU Horizontal Guidelines therefore require examination of both the purchasing market and relevant selling markets.

6. Exchange of Competitively Sensitive Information

Information exchange is one of the greatest risks associated with joint purchasing.

Potentially sensitive information includes:

• individual purchase prices;
• maximum willingness to pay;
• future purchasing volumes;
• supplier-specific strategies;
• production costs;
• inventory levels;
• future retail prices;
• margins;
• promotional plans;
• expected demand.

A properly structured purchasing organization should therefore receive only information necessary for the procurement function.

For example:

Lower risk:

Supplier A — required quantity 100,000 units — technical specification X.

Higher risk:

Company A will increase its retail price by 12% next quarter and will reduce purchases from Supplier B.

The latter can facilitate coordination unrelated to legitimate purchasing.

7. Buying Power and Monopsony

A purchasing alliance can acquire substantial buyer power.

Buyer power is not automatically unlawful. Problems arise where the purchasing group can substantially suppress competitive prices or otherwise harm the upstream market.

Possible effects include:

• supplier exit;
• reduced investment;
• lower quality;
• reduced innovation;
• reduced product variety;
• exclusion of smaller suppliers;
• worsening payment terms;
• reduced incentives for new entry.

The EU framework expressly recognizes that significant collective buying power can adversely affect suppliers and ultimately consumers, particularly where suppliers are concentrated or dependent on the purchasing group.

8. Supplier Foreclosure

A large purchasing group may require its members to purchase all or most requirements exclusively through the group.

This can produce foreclosure if suppliers outside the purchasing arrangement cannot obtain sufficient access to customers.

The analysis becomes particularly important where:

• the group has substantial purchasing power;
• alternative buyers are limited;
• suppliers are highly dependent upon the participating retailers;
• switching customers is difficult;
• the agreement covers most of the market.

The EU Guidelines distinguish restrictions objectively necessary for the operation of a purchasing arrangement from broad exclusive purchasing obligations that can create significant competitive effects.

9. Exclusion of Small and Medium-Sized Suppliers

Large buying groups can create pressure on smaller suppliers.

Potential problems include:

• demands for excessive rebates;
• unilateral changes to contract terms;
• listing fees;
• retrospective discounts;
• extended payment periods;
• threats of delisting;
• collective refusal to purchase.

This is particularly important where suppliers have few alternative customers.

A recent illustration is the AURA purchasing alliance involving Intermarché, Auchan and Casino. In 2025, the French Competition Authority's investigation identified potential upstream risks involving certain medium-sized suppliers, following which several such suppliers were excluded from the alliance's scope and returned to separate negotiations.

10. Exclusive Purchasing Obligations

A joint purchasing agreement may contain provisions requiring members to obtain all or most of their requirements through the purchasing organization.

Such provisions can be legitimate where necessary to ensure that the purchasing organization has sufficient volume to negotiate effectively.

However, excessive exclusivity may:

• prevent competing buying groups from developing;
• foreclose alternative suppliers;
• increase dependence on the purchasing organization;
• reduce competition between purchasing channels.

The legality therefore depends on the scope, duration, market power, necessity and actual effects of the exclusivity.

11. Market Definition

Competition authorities generally examine two markets.

A. Purchasing market

This asks:

How much purchasing power does the joint purchasing group possess relative to alternative buyers and suppliers?

Relevant factors include:

• combined purchases;
• supplier concentration;
• alternative customers;
• geographic market;
• substitutability;
• switching costs.

B. Selling market

This asks:

Do the purchasing-group members compete against each other when selling the final product?

This distinction is crucial.

If three retailers jointly purchase products but operate in completely separate geographic markets and are not potential competitors, downstream coordination risks may be considerably lower.

12. Market Share and Safe-Harbour Considerations

The EU approach does not treat a market-share threshold as an automatic answer.

The 2023 Horizontal Guidelines indicate that where parties' combined market shares do not exceed 15% on both the purchasing and selling markets, the conditions for Article 101(3) are likely to be satisfied. Above that level, however, the arrangement is not automatically unlawful; a more detailed effects analysis is required.

Relevant factors include:

• concentration;
• countervailing buyer/supplier power;
• supplier dependence;
• barriers to entry;
• duration;
• purchasing coverage;
• downstream competition;
• information exchange;
• exclusivity;
• efficiencies.

13. Joint Purchasing vs Buyer Cartel

The distinction is central to competition-law analysis.

14. Important Case Laws

1. Gøttrup-Klim Grovvareforening v Dansk Landbrugs Grovvareselskab (DLG), Case C-250/92

This is one of the leading European cases concerning cooperative purchasing.

A Danish agricultural purchasing cooperative restricted members from participating in competing organized purchasing arrangements.

The Court of Justice examined whether the restriction was necessary for the cooperative's effective operation and purchasing power.

Principle

A restriction associated with a purchasing cooperative is not automatically unlawful merely because it limits members' ability to cooperate elsewhere. The restriction must be assessed in light of:

• the structure of the market;
• the cooperative's objectives;
• the competitive position of the parties;
• whether the restriction is necessary for the cooperative to operate effectively.

The case remains fundamental for understanding ancillary restrictions in purchasing cooperatives.

2. White & White, Inc. v American Hospital Supply Corp., 540 F. Supp. 951 (W.D. Mich. 1982)

This U.S. case concerned group purchasing arrangements in the hospital-supply sector.

The court considered whether a group purchasing agreement could suppress competition in local or regional markets through exclusive purchasing arrangements.

Principle

A purchasing group may create competitive concerns where:

• it covers a substantial portion of a product submarket;
• purchasing is exclusive;
• an important local customer is removed from competing suppliers;
• the arrangement effectively forecloses competition.

The case demonstrates that group purchasing does not immunize exclusive dealing from antitrust scrutiny.

3. Elmore Community Hospital / Community Hospital – FTC Staff Advisory Opinion, 1995

Two rural Alabama hospitals proposed a joint purchasing venture to obtain:

• personnel;
• services;
• volume discounts;
• shared resources.

The FTC staff concluded that the arrangement appeared unlikely to violate antitrust law.

The arrangement fell within the health-care purchasing safety-zone principles because purchases represented less than 35% of the relevant market and the jointly purchased inputs represented less than 20% of participants' revenues.

Principle

A purchasing arrangement among competitors can be lawful where:

• genuine efficiencies exist;
• purchasing represents a relatively small portion of the relevant market;
• jointly purchased inputs are not sufficiently important to facilitate downstream price coordination;
• competitors remain independent in their principal selling activities.

4. Casino, Guichard-Perrachon / Intermarché Casino Achats

The European Commission investigated a purchasing alliance between major French retailers.

The investigation was significant because it involved a genuine purchasing alliance rather than simply a conventional buyer cartel.

The Commission was concerned that cooperation within the purchasing structure might facilitate information exchange and coordination concerning the retailers' downstream competitive behaviour.

The resulting litigation also produced important judgments concerning the Commission's investigative powers and dawn-raid evidence.

Principle

A purchasing alliance can attract antitrust scrutiny when the cooperation extends beyond legitimate procurement and becomes a mechanism for:

• exchanging strategic information;
• coordinating downstream conduct;
• aligning commercial strategies.

5. Ethylene Purchasers, European Commission, Case AT.40410

This is one of the clearest modern examples of a purchasing-side cartel.

The participants purchased ethylene and coordinated information and price-related positions concerning the monthly contract price.

The Commission concluded that the participants exchanged sensitive commercial and pricing information and coordinated their purchasing positions to influence negotiations with suppliers. The General Court subsequently considered the distinction between this purchaser cartel and other cartel situations.

Principle

Competitors cannot transform legitimate collective purchasing into unlawful coordination merely because the objective is to obtain a lower input price.

The critical distinction is:

Collective bargaining ≠ agreement among competitors on the price each will offer.

6. AURA Purchasing Alliance – French Competition Authority

The AURA alliance involves Intermarché, Auchan and Casino and covers substantial purchasing cooperation in consumer goods.

In 2025, the French Competition Authority identified potential upstream risks concerning several medium-sized suppliers. Following the investigation, several suppliers were excluded from the alliance's scope and returned to separate negotiations.

Principle

Even where a purchasing alliance is not itself treated as a traditional cartel, competition authorities may intervene where collective purchasing power creates significant supplier-dependence or upstream foreclosure risks.

This illustrates the modern emphasis on protecting competitive conditions for suppliers as well as downstream consumers.

7. Caremark / Express Scripts / OptumRx – FTC Insulin Matter

The FTC's insulin-related proceedings involving major pharmacy-benefit managers and affiliated group purchasing organizations provide a contemporary example of scrutiny of collective purchasing and intermediary buying power.

The FTC alleged that the major PBMs and their affiliated GPOs used rebate arrangements in a manner that contributed to higher insulin list prices. The FTC reported a 2026 settlement with Express Scripts entities involving changes to business practices.

Principle

Modern competition analysis of buying groups increasingly considers:

• intermediary purchasing power;
• rebate structures;
• supplier access;
• incentives created by purchasing arrangements;
• effects on downstream prices.

15. Information Exchange: A Separate Competition Concern

Even if the purchasing arrangement itself is legitimate, the information architecture can create antitrust liability.

A safe structure generally separates:

Information that may be necessary

• aggregated demand;
• technical specifications;
• delivery requirements;
• quality standards;
• total purchasing volume.

Information requiring significant caution

• individual future purchase volumes;
• individual reservation prices;
• future retail prices;
• individual margins;
• supplier-specific negotiating strategies;
• future output;
• promotional plans.

An independent purchasing entity can reduce risk by acting as an information firewall between competing members.

16. Digital Purchasing Platforms

The same principles apply to digital procurement.

Competition concerns may arise where a common purchasing platform:

• automatically shares competitors' bids;
• recommends common purchasing prices;
• uses algorithms to coordinate negotiations;
• discloses individual demand forecasts;
• prevents members from using alternative procurement platforms;
• collectively excludes suppliers;
• uses confidential supplier data to disadvantage particular suppliers.

Algorithmic coordination can make traditional information-exchange problems more difficult to detect because the coordination may be implemented automatically rather than through an explicit human agreement.

17. Joint Purchasing in Public Procurement

Joint purchasing also arises where several public authorities or institutions procure collectively.

Potential benefits include:

• lower procurement costs;
• standardized specifications;
• economies of scale;
• reduced administrative expenditure.

But problems can arise where competitors use a joint procurement mechanism to:

• divide tenders;
• coordinate bids;
• suppress competition;
• allocate customers;
• exchange future bidding strategies.

Therefore, joint purchasing should not be confused with joint bidding. Joint bidding concerns cooperation on the supply side of a tender, whereas joint purchasing generally concerns cooperation among buyers.

18. Indian Competition-Law Perspective

In India, joint purchasing must principally be examined under the Competition Act, 2002.

The key provision is Section 3, which addresses agreements that cause or are likely to cause an appreciable adverse effect on competition (AAEC).

A purchasing arrangement involving competitors may be examined for:

• price fixing;
• limitation of production or supply;
• market allocation;
• information exchange;
• foreclosure;
• collective buying power;
• exclusionary purchasing;
• downstream coordination.

Where an enterprise or purchasing group possesses substantial market power, Section 4 may also become relevant if the conduct amounts to abuse of dominant position.

The Competition Commission of India would ordinarily examine factors such as:

• relevant market;
• market shares;
• purchasing power;
• concentration;
• entry barriers;
• countervailing power;
• supplier dependence;
• consumer benefits;
• efficiencies;
• likelihood of foreclosure.

19. Factors Favouring Legality

A joint purchasing arrangement is generally less problematic where:

1. participants have modest market shares;
2. there are numerous alternative buyers;
3. suppliers possess substantial bargaining power;
4. participation is voluntary;
5. members can purchase independently;
6. the arrangement produces demonstrable efficiencies;
7. information sharing is restricted;
8. individual downstream pricing remains independent;
9. exclusivity is objectively necessary;
10. benefits are likely to reach consumers.

20. Factors Increasing Competition Risk

Risk increases where:

1. participants are major competitors;
2. the group accounts for a large proportion of purchases;
3. suppliers are concentrated;
4. suppliers are economically dependent on the group;
5. members exchange individual purchasing information;
6. the arrangement fixes maximum purchase prices;
7. members coordinate downstream prices;
8. purchasing is exclusive;
9. alternative purchasing groups are excluded;
10. the arrangement facilitates supplier foreclosure;
11. the arrangement extends into production or sales coordination;
12. efficiencies could be achieved through substantially less restrictive means.

21. Competition-Law Assessment Framework

A useful analytical sequence is:

Step 1 – Identify the arrangement
↓
Step 2 – Identify the participants and their competitors
↓
Step 3 – Define the purchasing market
↓
Step 4 – Define relevant downstream selling markets
↓
Step 5 – Calculate combined purchasing/selling shares
↓
Step 6 – Determine whether the parties possess buying power
↓
Step 7 – Examine information exchange
↓
Step 8 – Examine exclusivity and supplier restrictions
↓
Step 9 – Examine downstream coordination
↓
Step 10 – Identify efficiencies
↓
Step 11 – Test necessity and proportionality
↓
Step 12 – Assess actual or likely competitive effects

22. Key Distinction: Buying Power vs Buyer Cartel

This is the most important conceptual distinction.

Legitimate collective buying power

Competitors combine demand to negotiate better terms from suppliers while continuing to compete independently.

Problematic buyer cartel

Competitors coordinate the prices, quantities, suppliers or purchasing strategies they will independently adopt.

The first may produce efficiencies; the second can eliminate competition between buyers.

The EU's research on purchasing cases has specifically emphasized this distinction, noting that enforcement cases involving fines have generally involved buyer cartels rather than genuine efficiency-producing joint purchasing arrangements.

23. Conclusion

Joint purchasing occupies an important but sensitive position in competition law. Collective purchasing is not inherently anti-competitive and may generate substantial efficiencies through economies of scale, reduced transaction costs and stronger supplier negotiations.

The principal risks arise when the purchasing arrangement:

• becomes a buyer cartel;
• facilitates downstream price coordination;
• involves excessive information exchange;
• creates substantial monopsony power;
• forecloses suppliers;
• imposes unjustified exclusivity;
• disadvantages smaller suppliers; or
• eliminates competition beyond what is necessary for the legitimate purchasing objective.

The leading authorities—particularly Gøttrup-Klim, White & White, Elmore Community Hospital, Casino/Intermarché, Ethylene Purchasers, and the more recent AURA purchasing-alliance scrutiny—show that the central legal question is not simply whether businesses purchase jointly, but how the arrangement affects competition on both the purchasing and selling sides of the market.