E-commerce

E-commerce, short for electronic commerce, is the buying and selling of goods and services through computer networks, particularly the Internet. It encompasses consumer shopping, transactions between businesses, and purchases involving public institutions. For statistical purposes, its defining feature is generally the electronic placement or receipt of an order—not whether payment or delivery occurs online. An online order paid for in cash upon delivery can therefore qualify as e-commerce. (oecd.org)

Definition and scope

Definitions vary according to their purpose. The World Trade Organization adopted a broad definition for its 1998 work programme, covering electronically enabled production, distribution, marketing, sale, and delivery. Statistical definitions are narrower: the OECD defines e-commerce around orders placed through computer networks using methods specifically designed for ordering. This distinction separates the broader electronic commercial environment from measurable transactions. (wto.org)

The OECD’s 2025 interpretation includes orders through websites, apps, extranets, and electronic data interchange (EDI). Structured ordering tools within social-media or messaging platforms also qualify. Manually typed messages, telephone calls, and fax orders are excluded; the guidelines also exclude on-premise ordering mechanisms such as in-store kiosks. Consequently, everyday descriptions of “online selling” do not always correspond exactly to official e-commerce statistics. (oecd.org)

E-commerce and digital trade overlap but are not identical. In international statistical frameworks, digital trade comprises cross-border transactions that are digitally ordered, digitally delivered, or both. E-commerce also includes domestic transactions. A physical product ordered online is e-commerce without being digitally delivered, while a service delivered electronically can constitute digital trade even if its order was placed offline. (wto.org)

Historical development

Electronic commercial exchange predates consumer websites. Before the 1990s, businesses used EDI to exchange information through agreed technical arrangements. During the mid-1990s, the World Wide Web developed from an information resource into an environment for interactive commercial transactions, expanding beyond established business-to-business connections. (sciencedirect.com)

Subsequent development broadened the range of participants and business models. Online marketplaces connected previously unrelated buyers and sellers; subscription services supplied products continuously for recurring payments; and retailers combined physical stores with online channels. Mobile devices and new payment services further extended access. The COVID-19 pandemic accelerated online purchasing, although adoption remained uneven across economies. (oecd.org)

Main transaction types

E-commerce is commonly classified by the relationship between seller and buyer:

These categories describe the parties to a transaction rather than its technology. B2B commerce can use EDI or web-based systems, while consumer transactions commonly use websites and apps. Participation in an electronic procurement portal alone does not necessarily establish that a qualifying electronic order has occurred. (unctad.org)

B2B transactions are particularly important in global value chains, where electronically ordered inputs may pass through several businesses before a finished product reaches a consumer. E-commerce therefore extends substantially beyond online retail. (unctad.org)

Sales channels and business models

An enterprise may sell through its own online storefront or through an online marketplace that matches multiple sellers with buyers. Marketplace operators can also provide complementary services, including payments, fulfilment, customer support, and software. Their role as intermediaries is distinct from that of merchants selling their own products. (oecd.org)

Other models include subscriptions and omnichannel retailing, which coordinates online and physical channels. A customer may order remotely and collect from a store, for example. Mobile commerce identifies the device used, while social commerce identifies a social-media setting. These labels overlap with transaction categories: a mobile purchase can also be B2C, marketplace-mediated, and cross-border. (oecd.org)

Transaction process and supporting technology

A typical consumer transaction involves product discovery, selection, order submission, payment arrangements, fulfilment, and after-sales service. Commercial software connects product catalogues with order processing, inventory records, payment services, and customer management. Physical goods require shipping or collection; digital products may be supplied through electronic access or delivery. (ibm.com)

Logistics remains central even when ordering is digital. Inventory availability, warehousing, transport, and returns determine whether an order can be completed reliably. E-commerce therefore combines an electronic interface with operational processes rather than replacing those processes. (ibm.com)

Cybersecurity technologies protect transactions and sensitive information through measures such as encryption, authentication, and fraud detection. Artificial intelligence and machine learning are also used for product recommendations, customer-service interactions, inventory management, and transaction screening. These technologies support e-commerce but are not part of its defining statistical criterion. (ibm.com)

Economic effects and competition

E-commerce can reduce transaction costs associated with searching for products, comparing offers, and connecting geographically separated buyers and sellers. It can expand product choice and market access without requiring every seller to maintain a local storefront. These advantages nevertheless depend on payment access, delivery systems, skills, and consumer trust. (oecd.org)

Marketplaces exhibit network effects: attracting buyers can make a platform more valuable to sellers, and attracting sellers can improve its appeal to buyers. Such interdependence can support efficient matching but also contribute to market power. Competition analysis must consider platform fees, seller dependence, access to customers, and the possibility that users participate on several platforms simultaneously. (web-archive-storage.oecd.org)

Electronic markets are not automatically perfectly competitive. Greater price visibility can strengthen competition, while platform rules, ranking systems, data advantages, and restrictions on sellers can influence which businesses reach customers. Assessment therefore requires attention to both the underlying goods or services and the intermediary controlling the purchasing environment. (web-archive-storage.oecd.org)

Legal framework and consumer protection

Electronic contracting requires rules governing the validity of records, signatures, and communications. The United Nations Commission on International Trade Law adopted its Model Law on Electronic Commerce on 12 June 1996. It established principles of non-discrimination against electronic form, technological neutrality, and functional equivalence between electronic and paper-based communications. As a model law, it provides a framework for national legislation rather than directly imposing identical rules everywhere. (uncitral.un.org)

Consumer protection addresses misleading practices, payment security, contractual information, complaints, and remedies. Cross-border transactions create additional enforcement difficulties when buyers, sellers, platforms, and payment providers operate in different jurisdictions. The OECD’s 2016 recommendation supports protection comparable to that available in conventional commerce, including accessible dispute-resolution mechanisms. (oecd.org)

Data privacy is closely connected to payment protection because unauthorized access to personal information can facilitate fraud and identity theft. Payment safeguards may include limits on liability, chargeback mechanisms, or escrow arrangements, depending on the applicable framework. These mechanisms are not universal guarantees. (web-archive.oecd.org)

Measurement and limitations

E-commerce measurements may describe sales value, the proportion of businesses receiving electronic orders, or the proportion of individuals purchasing online. These indicators measure different aspects of activity and cannot be treated as interchangeable estimates of a single market. Coverage, ordering definitions, and survey methods also affect comparisons. (oecd.org)

UN Trade and Development estimated that business e-commerce sales in 43 economies approached US$27 trillion in 2022, compared with approximately US$17 trillion in 2016. This was an estimate for the economies covered, not a complete worldwide total or a measure of consumer retail spending alone. (unctad.org)

Access remains constrained by the digital divide, including differences in connectivity, income, skills, and infrastructure. Environmental effects are likewise conditional rather than uniformly beneficial or harmful. Warehousing, delivery routes, packaging, returns, and changes in consumer behaviour influence the result. Evaluating these effects requires life-cycle assessment and an explicit comparison with the purchasing and delivery patterns that e-commerce replaces. (unctad.org)

References

1. The 2025 OECD definition of e-commerce and guidelines for interpretationoecd.org
2. WTO: Work Programme on E-Commerce, Moratoriumwto.org
3. Digital trade and e-commerce—fundamental concepts and statistical definitionswto.org
4. Unpacking E-commerce: Business Models, Trends and Policiesoecd.org
5. What is Ecommerce?ibm.com
6. Implications of E-Commerce for Competition Policyweb-archive-storage.oecd.org
7. UNCITRAL Model Law on Electronic Commerce (1996) with additional article 5 bis as adopted in 1998uncitral.un.org
8. Consumer Protection in E-commerceweb-archive.oecd.org