“…Based on the foregoing arguments, most audit-fee studies predict a positive association between leverage and audit fees. Researchers use different measures of leverage as control variables in the audit fee model to capture auditors' exposure to the litigation risk (Badertscher, Jorgensen, Katz, & Kinney, 2014;De George, Ferguson, & Spear, 2013;Francis, Reichelt, & Wang, 2005;Kim et al, 2012), financial distress (Huang, Raghunandan, Huang, & Chiou, 2015), and client's financial risk (Bills, Jeter, & Stein, 2015).…”