Sophie Bergerbrant completed her doctoral thesis in archaeology in 2007 at the University of Stockholm. She currently leads the research project Bronze Age wool economy: production, trade, environment, husbandry and society at the department of historical studies, University of Gothenburg; Anna Wessman is currently a PhD candidate at the department of historical studies, University of Gothenburg. Her PhD project focuses on south Scandinavian rock art, with a special focus on regional features and styles in relation to time and change.