Novignon J, Lawanson AO. Efficiency of Health Systems in Sub-Sahara Africa: A Comparative Analysis of Time Varying Stochastic Frontier Models. AJHSS [Internet]. 2014 Oct. 15 [cited 2024 Apr. 19];2(5). Available from: https://www.ajouronline.com/index.php/AJHSS/article/view/1822