1. Department of Economics, University of Sheffield , 9 Mappin Street , Sheffield S1 4DT, UK
2. Department of Politics and International Studies and CAGE (Competitive Advantage in the Global Economy), University of Warwick , Coventry CV4 7AL, UK
3. Newcastle University Business School, Newcastle University , 5 Barrack Road , Newcastle upon Tyne, NE1 4SE, UK