Controlled experiments, using matched pairs of bogus transactors, to test for discrimination in the marketplace have been conducted for over 30 years, and have extended across 10 countries. Significant, persistent and pervasive levels of discrimination have been found against nonwhites and women...

In a field experiment of age discrimination, pairs of men aged twenty-seven and forty-seven, inquired, by email, about employment as waiters in twenty five Spanish towns. Discrimination against the older waiters, corresponded to the highest rates ever recorded anywhere, by written tests, for...

In a field experiment of age discrimination, pairs of men aged twenty-seven and forty-seven, inquired, by email, about employment as waiters in twenty four French towns. The rate of net discrimination found against the older French waiter, corresponds to the highest rates ever recorded anywhere,...

Carefully-matched pairs of written job applications were made to test for age discrimination in hiring. A twenty-one year-old and a thirty-nine year-old woman applied for jobs where a new graduate was sought; men aged twenty-seven and forty-seven, inquired about employment as waiters; women aged...