Mustaffa, A.H., Bahrudin, N.Z., Sahudin, Z., Abdullah, H. and Abdul Aziz, M.R. 2023. What have we Learned from Firm Efficiency Research for the Past 35 Years? A Bibliometric Analysis. Information Management and Business Review. 15, 1(I)SI (May 2023), 216-227. DOI:https://doi.org/10.22610/imbr.v15i1(I)SI.3406.