In this article not only the multi-activity DEA model is applied to determine the efficiency of individual services within different but highly homogeneous multi-mode transit firms, but the relationship between size and local returns to scale status of each transit service is also investigated....

This study examines the effects of trade policies on economic growth in Africa. The econometric methodology follows the cross-country studies by Barro (1991) and Kandiero and Chitiga (2003) with empirical application to a panel of 36 African countries observed over the period 1980 to 2009. Panel...