Undertaking these doctoral studies has been a truly life-changing experience for me, and it would not have been possible to do without the support, encouragement, guidance and friendship that I received from many people. At the end of this journey, I would like to express my sincere gratitude to all of them; they made this study possible. With immense pleasure and profound gratitude, I express my sincere and heartfelt thanks to my principal supervisor and teacher, Dr. Balázs Gyula Kotosz, associate professor, Faculty of Economics and Business Administration, University of Szeged, for his valuable guidance and relentless support throughout the PhD studies. His quick and insightful feedback expedited my research. I am also very grateful to my co-supervisor Dr. Izabella Szakálné Kanó, associate professor, Faculty of Economics and Business Administration, University of Szeged, for the excellent support and for her pertinent review of the entire paper and her editorial contributions which has improved my work substantially. Besides my supervisors, I would like to thank Prof. Imre Fertő, the General Director of Centre for Economic and Regional Studies, Budapest, and Dr. Eric Ruto, the Senior Lecturer, University of Lincoln, UK, for their pertinent review of the entire thesis and the insightful comments, suggestions and editorial contributions. My thanks are also extended to the other members of the faculty such as Dr. Zsófia Boglárka Vas and Dr. Beáta Udvari, for their assistance in the completion of this academic effort. Gratitude is also expressed for comments received in various research forums and annual PhD workshops held in the faculty. My special appreciation goes to the government of Hungary for awarding me full scholarship through Stipendium Hungaricum Scholarship Programme and the support and assistance accorded throughout my PhD program by Prof.