“…Numerous studies have analyzed whether changes in accounting systems, regulations, and environments increase or decrease the productivity or efficiency of accounting firms (Banker, Chang, & Cunningham, 2003;Banker, Chang, & Natarajan, 2005;Banker, Chang, & Natarajan, 2007;Chang, Choy, Cooper, & Parker, 2009a;Chang, Choy, Cooper, & Parker, 2009b;Chang, Huang, & Kuo, 2015;Hwang, Kang, & Hur, 2015;Hwang, Kim, & Jeon, 2005;Lee & Kim, 2001). Lee and Kim (2001) analyzed the relationship between the human resources input and revenue of Korean accounting firms from 1997 to 1999 by using a Cobb-Douglas production function.…”