Ahmed, Fulla Makee, and Eman Mohammed Abdullah. “Comparison Between Nelson-Olson Method and Two-Stage Limited Dependent Variables (2SLDV ) Method for the Estimation of a Simultaneous Equations System (Tobit Model)”. Journal of Economics and Administrative Sciences, vol. 27, no. 130, Dec. 2021, pp. 210-26, https://doi.org/10.33095/jeas.v27i130.2212.