Using data on German university graduates, this paper analyzes wage differentials by field of study at labor market entry and five to six years later. At both points in time, graduates from Arts and Humanities have lower average monthly wages compared to other fields of study. Blinder-Oaxaca...

Interaction effects capture the impact of one explanatory variable x1 on the marginal effect of another explanatory variable x2. To explore interaction effects, socalled interaction terms x1x2 are typically included in estimation specifications. While in linear models the effect of a marginal...