He specializes in Marketing and International Business Strategy and has consulted with companies such as AT&T, IBM, General Electrics and Nestle. Professor Czinkota has been listed as one of the three most productive contributors to International Business Research in the Journal of International Business Studies. Ilkka Ronkainen is an Associate Professor at the McDonough School of Business at Georgetown University. He specializes in Marketing and International Business and has spoken on global business at IBM and at the Helsinki School of Economics, Finland.