“…Human capital expenditure comprises firms' spending on enhancing their employees' experience, skills, competence, attitude, creativity, and motivation [18,40,41]; this includes labor costs, executive salaries, bonuses, severance pay, retirement benefits, and stock compensation costs [37,38]. Structural capital expenditure comprises enterprises' spending on sustaining the generation and implementation of employees' valuable ideas in their works [39] by promoting the organization's learning, process, and information achievement [41,42]; this includes R&D spending, ordinary development costs, royalties, book purchasing and printing expenses, education and training costs, computer processing fees, and employee benefits [37,38]. Relational capital expenditure indicates firms' spending on the establishment and advancement of collaboration with external partners.…”