Online platforms are a defining feature of today’s highly digital economy, reshaping how people access services, trade, and interact. Digital intermediation platforms (DIPs) – which connect buyers and sellers without taking ownership of goods or services – play a pivotal role in facilitating e-commerce and digital trade. DIPs can be "pure", solely intermediating transactions between buyers and sellers, or "hybrid", combining intermediation with direct retail or service activity and the physical infrastructure – such as warehousing or logistics. By lowering search, matching and transaction costs, DIPs facilitate cross-border e-commerce and digital trade, expanding market access for businesses, including micro, small and medium enterprises (MSMEs). Platform diffusion across countries nonetheless differs, shaped in part by domestic regulatory environments governing trade in digitally enabled services.
This paper develops new cross-country proxy indicators of DIP uptake and foreign presence across three major consumer-facing sectors – travel and accommodation booking, ride-hailing and carpooling, and business-to-consumer or consumer-to-consumer (X2C) online marketplaces – drawing on website traffic data for close to 860 platforms. Covering OECD Member countries from 2010 to 2024, it examines how regulatory measures captured by the OECD Digital Services Trade Restrictiveness Index (DSTRI) are associated with platform diffusion and the presence of foreign-headquartered firms across markets.