Abstract: With the increasing aging of the workforce, how to stimulate the work vitality and learning motivation of older employees in the later stages of their careers to promote their job prosperity has become an important issue in organizational management in the context of population aging. Based on the self-determination theory, this study explores the impact of intergenerational knowledge sharing among older employees on their job prosperity, as well as its mechanism and boundary conditions. Data analysis is conducted on 330 valid questionnaires collected across three stages. The results show that intergenerational knowledge sharing among older employees can promote their job prosperity, that psychological needs satisfaction plays a mediating role, and that perceived knowledge absorption ability of younger employees not only positively moderates the relationship between intergenerational knowledge sharing among older employees and psychological needs satisfaction, but also positively moderates the indirect effect of intergenerational knowledge sharing among older employees on their job prosperity through psychological needs satisfaction. Therefore, organizations should encourage older employees to actively participate in intergenerational interactions, emphasize the important role of individual psychological needs satisfaction in achieving job prosperity among older employees, and pay attention to and enhance the knowledge absorption ability of younger employees.

Key words: older employees, intergenerational knowledge sharing, psychological needs satisfaction, job enrichment, knowledge absorption ability of younger employees