Productivity Change in the Oil Blocks of Angola

This artical analyzes the efficiency and productivity growth of a representative sample of Angolan oil blocks from 2002 to 2008, using the directional distance function and the Luenberger productivity indicator. The primary advantage of this approach is that both input contractions and output expansions are considered. The model generates a productivity indicator that is decomposed into the two usual constituents of productivity growth: technological change and efficiency change. For comparative purpose a Malmquist productivity index is presented. The results show that, on average, Angolan oil blocks did experience some productivity growth during the period analyzed. In addition, the incidence of technological change was positive.