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Abstract: This study aims to investigate the impact of the depth of regional trade agreements (RTAs) on the formation and expansion of regional value chains (RVCs). Focusing on RTAs and intermediate goods trade among 21 Asia-Pacific countries from 1995 to 2020, this study employs social network analysis to visualize the characteristics of RTAs and the intermediate goods trade network over a 26-year period. Using Quadratic Assignment Procedure (QAP) regression analysis, we empirically examine the effects of RTAs on intra-regional intermediate goods trade. The findings reveal that the depth and legal effectiveness of RTAs significantly enhance intra-regional intermediate goods trade. Specifically, deeper RTAs with more provisions effectively eliminate trade barriers, facilitating the movement of intermediate goods and significantly enhancing regional value chains. Furthermore, highly effective legal provisions reduce uncertainties in intermediate goods flow, further securing regional value chain development. This study provides robust theoretical support for the restructuring of regional value chains and economic integration in the Asia-Pacific region through detailed analysis and empirical validation.

Keywords: Regional Trade Agreements; Agreement Depth; Intermediate Goods Trade; Regional Value Chains