The Theory of Preferential Trade Agreements: Historical Evolution and Current Trends
梳理优惠贸易协定理论的两阶段演进，结合历史背景与政策关切，为理解不同分析路径提供连贯视角。
The theory of preferential trade agreements (PTA's), or what might be described in policy terms as the General Agreement on Tariffs and Trade (GATT) Article XXIV sanctioned free-trade areas (FTA's) and Customs Unions (CU's), has undergone two phases of evolution, in two very different modes, largely reflecting the contrasting policy concerns of the time. In this paper, we trace this evolution, offering both a historical context and an intellectual coherence to diverse analytical approaches.