Internal employee motivations or employee personality traits.
Remember, based on the context of this example, we notice here that, the two employees had different personalities, and thus affected their job selection.
Personality of an employee serves as internal motivation for certain job duties and may affect the quality of their work. Thus, recruitment staff should always strife to place the right person for the right job.
Re = cost of equity, Rd = cost of debt, E = market value of the firm's equity, D = market value of the firm's debt, V = E + D, E/V = % of equity financing, D/V = % of debt financing, Tc = corporate tax rate