Saeed Salih, S.J. and Khalil, M.H. 2023. Measuring and analyzing the impact of public investment spending on national income 2005-2020. Tikrit Journal of Administrative and Economic Sciences. 19, 61, 1 (Mar. 2023), 747–761. DOI:https://doi.org/10.25130/tjaes.19.61.1.40.