DAT, Vu Hoang; HIEN, Pham Thu; HAI, Nguyen Nam. Return to scale, the missing middle and policy implications for supporting firms’ development and technology upgrading. Journal SCIENCE AND TECHNOLOGY POLICIES AND MANAGEMENT, [S. l.], v. 9, n. 4, p. 18–38, 2021. Disponível em: https://vietnamstijournal.net/index.php/JSTPM/article/view/352. Acesso em: 28 may. 2026.