Turnacıgil, Seda. “The Impact of Agency Costs on Investment Efficiency: Evidence from Overinvestment and Underinvestment in Borsa İstanbul”. Journal of Applied And Theoretical Social Sciences 8, no. 3 (September 25, 2026): 373–394. Accessed October 23, 2026. https://www.iccsor.com/index.php/jatss/article/view/452.