“…Lerner's higher values indicate more market power and less competitive conditions (Chambers, Färe, & Grosskopf, 2014;Khan et al, 2016;Lerner, 1934;Moyo, 2018; T. D. Nguyen, A. T. Ha, & B. T. T. . The Boone Index was used to measure the competitiveness of enterprises (Chambers et al, 2014;Khan et al, 2016;Leuvensteijn, Bikker, Adrian, Rixtel, & Sorensen, 2007;Moyo, 2018). Boone Index shows that competition helps strengthen the capacity of the company's operating efficiency and weaken the ability of the company's operating inefficiency.…”