Does pay transparency narrow gender pay gaps?

Pay transparency can narrow a gender pay gap, but transparency is not one intervention and a smaller gap is not always created by raising women’s pay.

The four peer-reviewed country studies compared here disagree for an informative reason. Publishing individual salaries, reporting aggregate gaps, giving workers access only when they ask, and putting ranges in job ads expose different information to different people. They also create different pressure to act.

Canada found a smaller gap after individual salaries became public

A 2023 study tracked 50,332 full-time university faculty across Canada from 1989 to 2018. Provincial laws arrived at different times and publicly disclosed individual salaries above specified thresholds.

The design compared academic peer groups with and without colleagues whose pay crossed a disclosure threshold. Across specifications, the laws reduced the conditional gender salary gap by 1.2 to 2 percentage points. That equals roughly 20% to 30% of the initial 6% gap and accounts for approximately 25% to 40% of the overall five-point decline through 2018. The abstract summarizes the effect as 20% to 40%.

The effect was stronger in unionized workplaces and among full professors. The separate estimates for men’s and women’s salary levels changed with model specification, so the study does not support a simple claim that disclosure raised women’s pay by a fixed amount.

Denmark narrowed the gap mainly through slower wage growth for men

Denmark’s 2006 law covered employers with at least 35 employees only where a six-digit DISCO occupation contained at least 10 men and 10 women. An agreed internal equal-pay report was available as an alternative to the statistics. For the empirical design, the researchers assigned treatment using the 35-employee cutoff alone; they did not apply the 10-men/10-women occupation-cell criterion. They compared firms with 35 to 50 employees with firms just below the size threshold, at 20 to 34 employees.

The gender pay gap fell by about 2 percentage points, or 13% relative to its pre-law mean. The main adjustment was slower wage growth for male employees, not a detected acceleration in female wage growth.

The overall wage bill fell. The study found no effect on profitability and also reported lower productivity, which the authors offered as a possible offset. Transparency compressed one gap, but it was not a cost-free raise for the lower- paid group.

Austria found no detectable change from internal gap reports

Austria’s 2011 law required firms above size thresholds to prepare internal gender-pay reports. A 2023 event study found no discernible effect on male or female wages and no change in the gender wage gap.

The estimate was precise enough to rule out a reduction larger than 0.4 percentage points. The authors also found no wage compression within establishments.

That null matters because it prevents the successful country cases from being treated as a universal policy effect. A report can exist without creating public comparison, bargaining leverage, enforcement or a visible response.

Germany’s on-request right also produced a precise null

A peer-reviewed April 2026 study examined Germany’s right for workers in establishments that usually have more than 200 employees under the same employer to request comparison-pay information. The empirical design used a firm-size cutoff and large linked employer-employee data.

During the first four years, wages and the gender wage gap in treated firms were unchanged. The preferred estimate was below a 0.2 percentage-point change, and the 95% interval excluded a gap reduction greater than 1.77 percentage points.

This is not evidence that information never matters. It is evidence that making information available only when a worker requests it was insufficient in that setting. Take-up and the action after disclosure are part of the mechanism.

Salary ranges in job ads solve a different information problem

Job-posting laws show applicants a range before they enter or finish a hiring process. They may change cross-firm competition and negotiation without telling current workers what comparable colleagues earn.

A November 2025 NBER working paper on recent US state laws found that salary information in postings rose by 30 percentage points and wages increased by 1.3% to 3.6% across three datasets, with no detected change in pay dispersion, employment, posting volume or skill requirements. Its abstract does not establish that the gender gap narrowed.

Two preliminary 2026 studies report competing gender patterns from US salary-range mandates. Koenraadt and colleagues associate mandates in Colorado, Washington and California with narrower gender pay gaps. A Vance, Cheong and Tsui conference abstract reports no salary-gap reduction and a wider total- compensation gap through lower equity compensation for women. Neither result is peer reviewed, and each uses a different dataset and specification.

The EU now combines several forms of transparency

The EU Pay Transparency Directive reached its national transposition deadline on 7 June 2026. It combines pre-employment salary information, a ban on asking for pay history, worker information rights, employer gap reporting and stronger enforcement mechanisms.

The first scheduled organization reports begin in 2027 for employers with 150 or more workers; the 100-to-149 group follows in 2031. The directive therefore cannot yet be credited with closing the EU-wide gap. It is a multi-part policy whose effects will need to be separated as implementation and reporting data arrive.

What type of transparency produced what result?

The evidence supports conditional confidence, not one headline verdict. Transparency works through what people can see, whether they receive it automatically, who can act on it, and what employers do in response.

Original sources

• Baker et al., 2023 Canada
• Bennedsen et al., 2022 Denmark
• Gulyas et al., 2023 Austria
• Brütt and Yuan, 2026 Germany
• Arnold et al., 2025 US job postings
• Koenraadt et al., 2026 preliminary US study
• Vance, Cheong and Tsui, 2026 conference abstract
• EU Pay Transparency Directive

Independent editorial summary. The authors are not affiliated with LifeScore.