Asongu, Simplice A.
Nwachukwu, Jacinta C.
Article History
Received: 4 November 2016
Accepted: 9 March 2017
First Online: 20 March 2017
Compliance with Ethical Standards
: The authors are self-funded and have received no funding for this manuscript. This article does not contain any studies with human participants or animals as performed by the authors.
: The authors declare that they have no conflict of interest.