Ossel Advisory helps European organisations measure, close, and sustain pay equity - combining statistical rigour with strategic compensation expertise.
From one-off pay audits to continuous monitoring, we combine expert consulting with proprietary statistical tools.
Full OLS regression with R2, p-values, Oaxaca-Blinder decomposition, and Welch t-tests per subgroup. Legally defensible, regulator-ready reports.
See methodology ->End-to-end support for the EU Pay Transparency Directive - job architecture, equal value assessments, mandatory disclosure, joint pay assessment workflows.
View regulations ->Fair, competitive salary bands grounded in market benchmarking. Merit matrix design, compa-ratio analysis, and budget-constrained remediation planning.
Explore RightPay ->Bespoke quantitative analysis: mixed-effects modelling, intersectional analysis, WIF taint detection, and attorney-client privileged audits.
Meet the team ->Multi-year plan with budget-optimised adjustments, phased timelines, and cost projections. R.O.S.A. methodology for maximum gap reduction per euro.
Model in RightPay ->Equip your HR and compensation teams to maintain equity independently. Statistical interpretation workshops and manager decision-making frameworks.
Get in touch ->RightPay Analytics is Ossel Advisory's proprietary platform - combining OLS regression, Oaxaca-Blinder decomposition, and AI-powered insights in a single browser-based tool that runs entirely client-side. No data leaves your machine.
Every engagement follows the same rigorous process - no black-box outputs, no gamification, no pre-set reference classes.
Validate compensation data - currency, missing values, structural issues - before any model runs.
Test each control variable for correlation with protected characteristics. Tainted WIFs flagged before inclusion.
Multivariate OLS on log-salary with HC0 robust SEs. R2, p-values, t-statistics, and 95% CI surfaced explicitly.
Proper two-fold decomposition with separate group regressions, separating explained from unexplained gap.
Two-sample Welch t-tests per department, grade, location, and quartile. Glass ceiling detection via quantile regression.
Budget-constrained optimisation maximising gap reduction per euro. Individual adjustments with phased timelines.
Outputs mapped to EUPTD Articles 6, 7, 8, 9. Privileged analysis mode for legal counsel-directed audits.
Quarterly re-run cadence with trend tracking. Real-time guardrails on hire and promotion salary decisions.
Ossel Advisory monitors and implements requirements across all major pay equity frameworks.
Directive 2023/970 - publish pay ranges, report gender pay gaps, conduct joint pay assessments when gap exceeds 5%. Transposition: June 2026.
Full coverageLoi du 22 avril 2012 - mandatory pay analysis for companies with 50+ employees every two years. Joint committee reporting included.
Full coverageLoi Rixain - companies with 50+ employees must publish a gender equality index (0-100) and remediate within 3 years.
Full coverageCompanies with 250+ employees publish mean and median pay gaps, bonus gaps, and quartile distributions annually.
Full coveragePay equity disclosures required under ESRS S1 as part of the Corporate Sustainability Reporting Directive social pillar.
Full coverageAudits under legal counsel direction run in privileged mode - watermarked outputs, export restrictions, and a generated privilege log.
On requestUpload your compensation CSV to RightPay Analytics. OLS-adjusted gap with p-values, R2, and Oaxaca-Blinder decomposition - no account, no installation.
Launch RightPay Analytics - free ->"Pay equity is not a once-a-year project. It is a way to run the company - every hire, every promotion, every merit cycle."
Ossel Advisory was founded in Brussels to fill the gap between sophisticated statistical methodology and practical compensation management. Every organisation deserves access to Fortune 500-grade analytical rigour - without the enterprise contract.
Yoann Vanossel is a compensation advisor and data scientist focused on pay equity. He combines job architecture, level calibration, and rigorous statistical analysis to deliver practical, regulator-ready decisions for European organisations.
OLS - Oaxaca-Blinder - Welch t-tests - Quantile regression - WIF taint detection - Dynamic reference groups
Legal counsel for privileged audits - Labour economists for expert witness support - HRIS integration specialists