Subtle persuasion is an ineffective way of attacking recruitment bias against older workers, a recent study shows. But when a company clearly stated a desire to increase age diversity by hiring older adults, such bias was effectively removed. The study showed “considerable bias against older job candidates”. Researchers from the London School of Economics and the University of Essex found ran thousands of simulated hirings with potential recruiters, asking participants to read different diversity statements before choosing. These including one bundling gender, race and age. But only when hiring companies were explicit about the value of older workers and diversity was the bias against older workers eliminated.