Previous empirical research has found that perceived under-reward in relation to both internal and external pay referents negatively affects work attitudes such as pay satisfaction. Unjust procedures in the workplace have similar negative effects. This study compares the effects of internal pay comparisons, external pay comparisons, and procedural justice on professor work attitudes such as job satisfaction, morale, and turnover intentions. Results varied across outcomes, though internal pay comparisons and procedural justice were found to have the most consistently significant effects. Implications for faculty compensation policies are discussed.