Wage responses to gender pay gap reporting requirements

Summary

Jack Blundell's 2021 research paper, "Wage responses to gender pay gap reporting requirements," investigates the effectiveness of policies that mandate employers to publicly disclose their gender pay gap statistics. The study specifically focuses on the United Kingdom's reporting policy, which obliges firms with 250 or more employees to publish their gender pay gap data annually. Blundell's objective is to contribute to the ongoing academic and policy debate regarding whether such transparency measures effectively pressure companies to close pay disparities or if they are largely ineffectual. For its methodology, the paper employs a robust difference-in-difference strategy, capitalizing on a discontinuous size threshold inherent in the UK policy's coverage. This approach allows for a direct comparison between employers subject to the reporting requirements (those with 250 or more employees) and a carefully chosen control group of smaller firms that are exempt. The primary data source for this quantitative analysis is linked employer-employee payroll data, enabling precise measurement of wage responses to the policy's implementation. To further enrich the understanding of the underlying mechanisms driving these wage changes, Blundell augments the quantitative analysis with newly gathered survey evidence from UK workers. This survey includes a hypothetical choice experiment designed to elicit and quantify worker preferences and their reactions to publicly available gender pay gap information. The key findings of the research indicate a significant impact of the reporting requirements. Blundell demonstrates that the introduction of these transparency policies led to a substantial 1.6 percentage-point narrowing of the gender pay gap at the affected employers. This is a considerable effect, corresponding to 19% of the total gender gap observed in the estimation sample of 8.6 percentage points. Crucially, the study identifies that this reduction is primarily attributable to a decline in male wages within these firms, rather than being caused by changes in the composition of the workforce. To explain this phenomenon, the paper proposes that a "worker preference against high pay gap employers" is a key driver, motivating companies to close these gaps once such information becomes public. Supporting this hypothesis, the survey evidence reveals a high level of awareness among workers regarding the policy, primarily through media reports. Furthermore, the survey highlights a strong preference among female workers for employers with smaller pay gaps; over half of the women surveyed indicated a willingness to accept a 2.5% lower salary to avoid an employer with a high pay gap, with the average willingness to accept lower pay being 4.9%. In contrast, male workers were found to be largely unaffected or insensitive to this publicly available pay gap information. These findings collectively imply that pay transparency policies can serve as an effective instrument for reducing gender pay disparities, largely by influencing employee choices and, as a consequence, shaping employer behavior.