Structural Vulnerability Analysis of Imported Seafood Supply Chains : A Quantitative Assessment Using Market Concentration, HHI, and CV

This study analyzed structural vulnerabilities of Korea's imported seafood supply chain using concentration ratios (CRk), Herfindahl-Hirschman Index (HHI), and coefficient of variation (CV). Results showed 83.2% of species exhibit high concentration (CR1≥50% or CR2≥70%), while 71.0% demonstrates excessive market concentration (HHI≥0.4). CV analysis revealed high volatility in major products: pollock (0.62), Alaska pollock surimi (0.44), other fish surimi (0.33), frozen shrimp (0.32), and fishmeal (0.31), indicating urgent need for comprehensive supply chain stabilization systems.