Trade in services drives the exchange of ideas, know-how and technology. It helps firms cut costs, increase productivity, participate in global value chains and boost competitiveness. Consumers benefit from lower prices and greater choice. However, international trade in services is often impeded by trade and investment barriers and domestic regulations. Moreover, differences in regulation can constitute additional trade costs in their own right as services suppliers must comply with multiple sets of regulations.

The STRI heterogeneity indices are bilateral measures of regulatory heterogeneity. They are calculated on the basis of detailed information from the Services Trade Restrictiveness database and take values between zero and one. The score represents the weighted share of the total number of measures to which the country pair has different answers. The indices are available by country pair, sector and year.

The OECD Digital STRI identifies, catalogues and quantifies barriers that affect trade in digitally enabled services across 50 countries. This data provide policy makers with an evidence-based tool that helps to identify regulatory bottlenecks, design policies that foster more competitive and diversified markets for digital trade, and analyze the impact of policy reforms.

The OECD intra-EEA STRI heterogeneity indices complement the newly published intra-EEA STRI's and presents indices of regulatory heterogeneity, The indices are built from assessing – for each country pair and each measure – whether or not the countries have the same regulation. For each country pair and each sector, the indices reflect the (weighted) share of measures for which the two countries have different regulation.

The intra-EEA Services Trade Restrictiveness Index identifies and catalogues which policy measures restrict trade within the European Economic Area (EEA) for 24 OECD EU member countries. This data complement the existing STRI, which quantifies multilateral services trade restrictiveness, allowing to track the progress of regional services integration across 19 major services sectors.