Xiaohong, C., Tomás Lopes, I., & Lin, C. (2026). The upper echelons theory and R&D investment; A case study of China’s high-tech companies. Contaduría Y Administración, 71(2), e549. https://doi.org/10.22201/fca.24488410e.2026.5849 (Original work published 17 de febrero de 2026)