“…Despite its shortcomings, Ricardian model has been extensively applied to a number of countries such as United States (Mendelsohn et al, 1994(Mendelsohn et al, , 1999, Brazil (Sanghi, 1998) China (Liu et al, 2004) and India Kumar & Parikh, 1998, 2001. Similar approach has been applied in Africa: Cameroon (Molua, 2002, Molua & Lambi, 2006, Senegal (Sene et al, 2006), Kenya (Kabubo & Karanja, 2007), Srilanka (Seo et al, 2005;Kurukulasuriya & Ajwad, 2004), Ethiopia (Deressal et al, 2005) South Africa (Gbetibou & Hassan, 2005), Egypt (Eid et al, 2005) and Nigeria (Ajetomobi et al, 2011;Fonta et al, 2011).…”