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Disentangling the European airlines efficiency puzzle: a network data envelopment analysis approach (2015)
Journal Article
Duygun, M., Prior, D., Shaban, M., & Tortosa-Ausina, E. (2016). Disentangling the European airlines efficiency puzzle: a network data envelopment analysis approach. Omega, 60, (2-14). doi:10.1016/j.omega.2015.06.004. ISSN 0305-0483

© 2015 Elsevier Ltd. In recent years the European airline industry has undergone critical restructuring. It has evolved from a highly regulated market predominantly operated by national airlines to a dynamic, liberalized industry where airline firms... Read More

How a regulatory capital requirement affects banks' productivity: an application to emerging economies (2015)
Journal Article
Duygun, M., Shaban, M., Sickles, R. C., & Weyman-Jones, T. (2015). How a regulatory capital requirement affects banks' productivity: an application to emerging economies. Journal of productivity analysis, 44(3), 237-248. doi:10.1007/s11123-015-0451-1

© 2015, Springer Science+Business Media New York. This paper presents a novel approach to measure efficiency and productivity decomposition in the banking systems of emerging economies with a special focus on the role of equity capital. We model the... Read More

Measuring competition using the Boone relative profit difference indicator (2015)
Journal Article
Weyman-Jones, T., Duygun, M., Shaban, M., & Thomas, G. (2015). Measuring competition using the Boone relative profit difference indicator. Economics letters, 132, (117-120). doi:10.1016/j.econlet.2015.04.022. ISSN 0165-1765

This paper suggests a method for implementing the theoretical relative profit difference test for intensity of competition due to Boone (2008). An empirical illustration is given for banking systems in emerging economies.