Abstract:
First, I would like to thank my family and my girlfriend Selam for their love and support
throughout my postgraduate school time. The completion of this thesis was made possible by
their sacrifice, forbearance, patience and support. I would also like to extend my deepest
gratitude to my advisor Abebe Assefa (Asst. Professor) who helped me in writing this research. I
have immensely benefited from his commitment at all stages of the research work. Without his
critical and constructive comments, the thesis would not have ended. However, the responsibility
for any remaining mistakes is solely mine. Finally, I would like to thank the respondents and my
friend Hiruy Gebregiorgis, for his positive comments and suggestions
