Yield Gaps and Technical Inefficiency Factors for Major Cereal Crops in Ethiopia: Panel Stochastic Frontier Approach. Ethiopian Journal of Economics, [S. l.], v. 31, n. 1, p. 81–100, 2022. Disponível em: https://ethiopianjournalofeconomics.org/index.php/EJE/article/view/240.. Acesso em: 15 jul. 2026.