“…Merger waves within the trade union movement have been widely reported over the years. Recently, mergers have been depicted as a defensive strategy within the context of an increasingly hostile union environment and declining membership (Baraldi et al ., ; Blaschke, ; Waddington, ; Willman and Cave, ). Concurrently, mergers are broadly advocated and internally driven by senior union officers and leaders (Chaison, ; Ebbinghaus, ).…”