The study by In-Sue Oh and colleagues, published in the Journal of Applied Psychology, tests a dual internal fit model of HR systems, demonstrating that synergistic interactions within and among the Ability, Motivation, and Opportunity (AMO) domains significantly improve workforce productivity and firm profitability. Using six waves of panel data from 640 Korean firms, the authors find that paired HR practices in each domain and combined interactions across AMO domains yield stronger positive effects than additive models that sum individual practice impacts. Workforce productivity serves as a key mediator linking these interactive HR effects to profitability. The findings emphasize the hierarchical and interconnected nature of HR systems and their critical role in maximizing firm performance.
Do human resource systems indeed have “system” effects? The dual internal fit model of a high performance work system
