Cookie
policy

The site uses cookies that are strictly necessary for it to work (session, security, preferences).

With your consent, it also uses Google Analytics (GA4) to measure audience. No audience-measurement tracker is set, and no measurement script is loaded, until you have accepted in the banner.

Technical cookies serve the proper functioning of the interface, keeping the session, and remembering some display choices.

Audience measurement is used to know whether the service is actually used: pages viewed, indicators and studies opened, account creation and sign-in, returning visitors. No data is sold or used for advertising.

Neither your email, nor your name, nor your account identifier is sent to Google. A signed-in account is designated by a stable pseudonymous identifier (an irreversible hash of the internal identifier), which makes it possible to count active users without identifying them.

Your choice is kept in your browser. Withdrawing it stops future collection; data already collected is kept by Google Analytics according to the property’s retention period (14 months at most).

• __session: session of a signed-in account, strictly necessary, 5 days at most, deleted on sign-out.
• lang: page language, strictly necessary, 1 year.
• Audience-measurement choice and display preferences: browser local storage, with no expiry date, until you change them or clear the site’s data.
• _ga and _ga_<identifier>: Google Analytics audience measurement, only after your consent; lifetime capped at 13 months, the ceiling recommended by the CNIL (the French data protection authority).

Audience-measurement data may be processed by Google outside the European Union, in particular in the United States: the framework for this transfer is described in the privacy policy.

You can accept or decline audience measurement at any time.