Professor Tessema's main areas of teaching and research interests are corporate finance and investments. Professor Tessema has published research papers in the American Business Review, Journal of Financial Education, Journal of International Finance, Mid-American Journal of Business, Journal of Global Business, African Development Review, The International Journal of Finance and in several conference proceedings; and a chapter in a book. He has served as an ad-hoc reviewer for the Journal of Financial Education and the Mid-American Journal of Business. He is the treasurer of the Ethiopian American Educational Foundation.
"Competitive Currency Devaluations, Quantitative Easing and Volatility of Exchange Rates" Published by the Journal of International Business Research, Volume 15, Issue 1, 2016, PP 15-31, Co-authored with A. Mulugetta and Y. Mulugeta.
"Systemic Economic Transition of East African Community Customs Union" The Journal of Current Research in Global Business, Volume 15, No 24, 2012, PP 108-120. Co-Authored with A. Mulugetta and Y. Mulugetta.
"Higher Education in Ethiopia: Challenges and the Way Forward" International Journal of Education Economics and Development. Vol. 2, No 3, 2011. PP. 225-244. Co-Authored with M. Abebe.
"The Buy-Back option on leased assets: Economic Value and Deal Sweetener under asymmetric information" Review of Business Research journal, Vol. 11, Number 2, 2011, PP. 68-73. Co-Authored with A. Diallo and S. Kim.
"A Note on International Technology Transfers" Review of Business Research journal, Volume 10, Number 4, 2010. PP 201-208. Co-Authored with A. Diallo.