Export Performance and Productivity: Rationale for a Macro Level Evidence in CEMAC

Since the classical theory of comparative costs have been well assess with productivity’s firms level evidence, considering the lack of data’s about this productivity’s firm level evidence on Sub-Saharan Africa Region, the main aim of this study is to give rationality of this classical theory of comparative costs even with macro level evidence for this area. To assess on the rationale of this macro level evidence the analysis lies on the one hand on the stochastic growth model with the scheme giving by panel data Bayesian estimates and shrinkage estimates and on the other hand on the Balassa Samuelson Effect with evidence of them realized by the panel cointegrating technique. Globally speaking, the obtained results with a subset of countries in Africa Region the namely CEMAC are supportive of the macro level evidence for the classical theory of comparative costs.