There is some new research by Castilla and Bernard:
In this article, we develop and empirically test the theoretical argument that when an organizational culture promotes meritocracy (compared with when it does not), managers in that organization may ironically show greater bias in favor of men over equally performing women in translating employee performance evaluations into rewards and other key career outcomes; we call this the “paradox of meritocracy.” To assess this effect, we conducted three experiments with a total of 445 participants with managerial experience who were asked to make bonus, promotion, and termination recommendations for several employee profiles. We manipulated both the gender of the employees being evaluated and whether the company’s core values emphasized meritocracy in evaluations and compensation. The main finding is consistent across the three studies: when an organization is explicitly presented as meritocratic, individuals in managerial positions favor a male employee over an equally qualified female employee by awarding him a larger monetary reward. This finding demonstrates that the pursuit of meritocracy at the workplace may be more difficult than it first appears and that there may be unrecognized risks behind certain organizational efforts used to reward merit. We discuss possible underlying mechanisms leading to the paradox of meritocracy effect as well as the scope conditions under which we expect the effect to occur.
The link is here, and for the pointer I thank Samarth Bhaskar.