During the last decade, economists have attempted to estimate hiring
discrimination against women in the labour market by means of correspondence
experiments.1 Within these experiments, pairs of fictitious job applications, only
differing by the gender of the candidate, are sent to real job openings. By means of
standard probit regressions of the subsequent call-back from the employer on the
gender of the candidate, discrimination is identified. The correspondence testing
methodology is the golden standard to estimate hiring discrimination in the labour
market. It allows to disentangle employer discrimination from supply side
determinants of labour market outcomes. Selection on gender differences in (the
average level of) unobservable characteristics is not an issue as all the employees’
individual characteristics are under control of the researcher (Riach and Rich
2002).