1. Rutgers Business School 1, Washington Park Newark , NJ 07102, USA . e-mail: cantwell@business.rutgers.edu
2. Strathclyde Business School 199, Cathedral Street, Glasgow G4 0QU, UK . e-mail: anna.spadavecchia@strath.ac.uk
3. Alfred D. Chandler Jr. International Visiting Scholar in Business History Harvard Business School, Soldiers Field, Boston, MA 02163 , USA