The Job Demands-Resources model (JD-R model) became highly popular among researchers. The current version of the model proposes that high job demands lead to strain and health impairment (the health impairment process), and that high resources lead to increased motivation and higher productivity (the motivational process). This chapter reviews the assumptions and development of the JD-R model and presents an overview of important fi ndings obtained with the model. Although these fi ndings largely support the model’s assumptions, there are still several impor- tant unresolved issues regarding the JD-R, including the model’s epistemological status, the defi nition of and distinction between “demands” and “resources,” the incorporation of pers...