However, most of the research has focused on scenarios that can be quantified, such as agricultural trade liberalisation or industrial tariff cuts, or both, leaving out a wide range of development-oriented issues that promise significant gains to most developing countries. These include services, AfT and trade facilitation, technical assistance and technology transfer, special and differential treatment, and more flexible rules of origin and rules relating to TRIPS. For this reason, even the most comprehensive study is at best a partial approximation to gains (or losses) arising from a successful conclusion of the Doha Round.