This dissertation comprises four empirical research articles that use personnel data from a large university and worker-level panel data from Finland to examine the determinants of wages, promotions and employee performance evaluations. The first article employs personnel data to examine the importance of worker output and job seniority as predictors of employee performance evaluations and promotions. The results suggest that better-performing employees – with output measured both in absolute terms and relative to peers – were more likely to be assigned higher performance grades and had a higher probability of being promoted to more complex jobs than their peers with similar characteristics but lower output. Additionally, ...