COSA
COnfidentiality Seasonal Adjustment and time series
Latest
OECD-Insee annual Workshop on Time Series Analysis for official statistics
Paris, La Muette, France on December 8th and 9th 2026.
Abstract submission is open and will close on September 30th 2026.
Details here.
In a nutshell
COSA is a European Statistics Action Grant consisting of two centres of excellence:
Centre of Excellence on Statistical Disclosure Control (SDC)
Centre of Excellence on Time Series Analysis and Seasonal Adjustment (TSA)
COSA is meant to
provide assistance and services to the ESS and the ESCB members in their activities regarding Time Series Analysis and Statistical Disclosure Control.
foster the development of a community of users, developers and statisticians.
The COSA consortium is composed of 12 different institutions and coordinated by the French National Statistical Institute, Insee.
Roadmap
In a context of development of common tools and methods within the ESS, this action carries on the work of the STACE project (2020-2024) around three pillars: knowledge sharing and support to practitioners, development and maintenance of bespoke software (JDemetra+ for TSA, τ-ARGUS and sdcMicro for SDC) and methodological guidance (Handbooks, Guidelines, research papers). The overarching goals is to provide user friendly, efficient and technically up-to date tools for statistical production in both fields.
In the previous project JDemetra+ has undergone a major refactoring with the development of version 3.x providing extensions of TSA algorithms, e.g. seasonal adjustment of high frequency data. The current action will aim at consolidating and completing this new version, by further extending some algorithms, improving technical and user-documentation, uploading R packages on CRAN and adapting JDemetra+ to new IT environments, like cloud infrastructure.
Τ-ARGUS is considered to be the standard software for table protection. However, τ-ARGUS urgently needs to be modernized. The current project will make a start with developing/designing a modern software architecture for and apply some of the ideas in a proof of concept. The other SDC tools as well as the “old” τ-ARGUS needs to be supported.
Eleven institutions (Insee, CBS, NBB, Istat, INE, Destatis, SURS, HSO, Statistic Austria, Iceland and Norway) are beneficiaries from this grant and will contribute in the aforementioned directions with the collaboration of the Deutsche Bundesbank in TSA. Additional institutions will be involved as members of user-groups and observers (ECB, ABS, OECD…).