Abstract: | This paper examines the process linking high‐performance work systems (HPWS) and organisational ambidexterity both at the unit and firm level of analyses by integrating strategic HRM, human capital and social capital perspectives. Multisource and multilevel data from 2,887 employees and 536 managers of 58 banks was collected. Results revealed that firm‐level HPWS were positively related to unit‐level employee human capital. Unit‐level employee human capital partially mediated the relationship between firm‐level HPWS and unit organisational ambidexterity. Furthermore, firm‐level social climate moderated the effect of firm‐level HPWS on unit organisational ambidexterity through unit‐level employee human capital. This paper contributes to HPWS and ambidexterity research by revealing the impacts of firm‐level HPWS and mediating mechanisms, as well as identifying boundary conditions for pursuing unit‐level organisational ambidexterity. |