Li, Sung KoSung KoLiDr. TSANG Chun Kei, ThomasThomasDr. TSANG Chun KeiDr. LEE Shu Kam2023-10-262023-10-262021Li, Sung-ko, Tsang, Chun Kei & Lee, Shu Kam (2021 Dec 16). S-shaped production function and efficiency measurement. Virtual African Productivity Conference 2021.http://hdl.handle.net/20.500.11861/8407enConference Paper