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Mbangala, A.M., Perelman, S. and Tarsim, A. 2020. Sub Saharan Railway Firms: Reforms and Demand Effects on Technical Efficiency - A Stochastic Frontier Analysis Between 1995 and 2005. Journal of Applied Business and Economics. 22, 9 (Dec. 2020). DOI:https://doi.org/10.33423/jabe.v22i9.3687.