Supply base complexity in times of crisis: moderating the negative impact of the Russia–Ukraine war
Journal: International Journal of Operations & Production Management
Year: 2025

Purpose The Russia–Ukraine war (RUW) has disrupted the operations of global supply chains, highlighting the need to enhance resilience against large-scale disruptions. Building on the dual nature of supply base complexity (SBC), this study examines the extent to which the war has impacted automotive firms and explores how horizontal and vertical SBC differently moderates its negative effects. Design/methodology/approach This study conducts an event study to estimate the abnormal stock returns of