“…However, supporting our argument of ESO–training complementarity on labor productivity, studies show that the relationship between ESO and investment in training is significantly positive within the United States and European contexts (Ben‐Ner et al, ; Guery & Pendleton, ; Pendleton & Robinson, ; A. M. Robinson & Zhang, ). Furthermore, studies of HRM policies in over 30 countries also demonstrate that ESO provides a reward for employees for investment in training while binding them to the firm in the longer term (Pendleton et al, ; Pendleton, Poutsma, Van Ommeren, & Brewster, ).…”