Why is it so difficult? Trade liberalization under the Doha Agenda
分析了世界贸易组织当前面临的困难，指出工业国非农业关税削减空间耗尽、非贸易关切重要性上升以及多极谈判体系调整不完全是关键因素。
Many explanations have been offered for the current difficulties of the World Trade Organization (WTO). In fact, the system appears to have managed many of these challenges reasonably well, including the increase in the number of members, its ‘mediaeval’ decision-making procedures, the changing geopolitical environment, the rapid growth of preferential trade arrangements (PTAs), the complexity of its agreements, and concerns about erosion of unilateral preferences. By contrast, the near-exhaustion of the traditional fuel of industrial-country non-agricultural tariffs, the increasing importance of non-trade concerns, and incomplete adjustment to a new, multi-polar negotiating system appear to be important factors requiring further examination.