For a selected group of Latin America countries we estimated the parameters of convergence equations on the basis of annual data. We test cross-country heterogeneity of parameters within a system of Seemingly Unrelated Regression Equations (SURE) that departures from standard approach utilizing...

This paper seeks to analyse from a comparative point of view the efficiency of the use of manual labour as well as the mechanized works in the cultivation of oil plants in order to obtain profit and the profitability of this activity from the point of view of conventional and ecological crops....