Bimonthly

Data collection is by post and via the internet over a period that extends from the end of the month preceding the survey month to the survey publication date, i.e. 4 business days before the end of the current month.

The collection period runs from the end of the month preceding the reference month of the survey to the date of publication of the results (between the 20th and 25th of the reference month).

The survey covers 3,000 companies.

All companies with more than 200 employees are questioned, and all those with a turnover of more than a certain threshold, depending on their sub-sector of activity.

3,000 units.

The survey is conducted every two months but not all questions are asked every month.

In practice, two models of questionnaires were created to take into account these specificities:
- the first questionnaire corresponds to the months of January and July;
- the second one is sent in March, May, September and November.

The published series are seasonally adjusted (CVS). Seasonality tests are carried out on all series. A series that initially has no seasonal character is presented as a CVS series with zero coefficients and is equal to the gross series. The effects are estimated with the TramoSeats software under JDemetra+ (provided by Eurostat). CVS indices for senior positions are obtained directly, not by aggregating the CVS indices that compose them.