1. Culture, Media and Creative Industries, King's College London, 221 Norfolk Building, Strand Campus, London WC2R 2LS, England
2. Ohio State University, 232 Agricultural Administration Building, 2120 Fyffe Road, Columbus, OH 43210, USA
3. Department of Economics, University of Reading, Whiteknights, PO Box 217, Reading RG6 6AH, England