International migration has increased steadily over the past decades and the integration of migrants into the labour market has become a challenge for many countries. Previous literature has found that immigrants, especially non-European immigrants, are disadvantaged in the labour market and that the degree of this disadvantage varies between applying for a job and being called for an interview. A problem in research in this area is the lack of empirical methods that can discern differences between different explanatory models. Our paper aims to investigate discrimination in the Swedish labour market. The research is conducted using four fictional characters of different nationalities who send applications to employers via LinkedIn. The results support both statistical and preference-based theories of discrimination and aim to address the incomplete information on which statistical discrimination is based and the hostility on which preference-based discrimination is based.