2 IZA Discussion Papers
IZA Discussion Paper No. 4199
published as 'A sequential Malmquist–Luenberger productivity index: Environmentally sensitive productivity growth considering the progressive nature of technology ' in: Energy Economics, 2011, 32 (6), 1345 - 1355
IZA Discussion Paper No. 1748
published in: Nanak Kakwani and Jacques Silver (eds.): Quantitative Approaches to Multidimensional Poverty Measure, Palgrave Macmillan, 2007