Most research on the factors driving employees to work longer than expected or preagreed has focused on behaviors of work extension and has widely neglected work intensification. Therefore, the aim of this study is to investigate whether job demands, as well as employees' job-related resources and personal resources (skill discretion, educational level), predict behavioral indicators of work extension (total working hours, overtime) and work intensification (skipping mandatory rest breaks). We use data from the sixth wave of a large cross-sectional and representative German employee survey (N = 10 148). The findings suggest that job demands and skill discretion are positively associated with the different behaviors of working longer. The relationship between work extension and skill discretion is stronger for higher-educated employees than for lower-educated employees. Our findings suggest that specific job demands and resources must be considered simultaneously to explain working longer and to differentiate between behaviors of working longer.
