“…Based on the literature (Mekonnen et al , 2015; Gregg, 2009; Obi and Kibirige, 2014; Ray and Ghose, 2014; Toma et al , 2015; Zhu and Lansink, 2010; Kinkingninhoun-Mêdagbé et al , 2010; Quiroga et al , 2014; Ostry et al , 2014; The Economist , 2014), our a priori expectations on the contextual variables are: R&D (+), land quality (+), health expenditure (+), education (+), FDI (+), GDP growth (+), GINI(±) and population growth (±).…”