[1] Univ Southern Calif, Dockson Chair Econ & Int Relat, Los Angeles, CA 90089 USA
[2] Vietnam Natl Univ, VNU Univ Econ & Business, Hanoi, Vietnam
[3] Queen Mary Univ London, London, England
[4] Univ Lorraine, Univ Strasbourg, BETA, CNRS, F-67000 Strasbourg, France
[5] Linkoping Univ, Dept Management & Engn, SE-58183 Linkoping, Sweden