We study the causal impact of revealing pro-unionism during the recruitment stage on hiring chances. To this end, we conduct a randomised field experiment in the Belgian labour market. When matched with employer and sector data, the experimentally gathered data enable us to test the heterogeneity of discrimination against pro-union applicants by the union density in the sector and the size of the firm. We find that disclosure of pro-unionism affects hiring chances in a negative way and that—in line with our expectations based on the literature—this negative impact is stronger in highly unionised sectors.
Baert, S., & Omey, E. (2015). Hiring Discrimination Against Pro-union Applicants: The Role of Union Density and Firm Size. De Economist, 163(3), 263-280. https://doi.org/10.1007/s10645-015-9252-1 (Original work published 2015)