Evaluation on the Operation Efficiency of Medical Device Enterprises Under the Background of Digital Transformation—Empirical Analysis Based on DEA-Malmquist. International Research in Economics and Finance, [S. l.], v. 6, n. 2, p. p22, 2022. DOI: 10.20849/iref.v6i2.1186. Disponível em: https://journal.chapjulypress.org/index.php/iref/article/view/2700. Acesso em: 7 mar. 2026.