TCM (tronc commun des ménages) Common household questionnaire
The Common household questionnaire (TCM) is a common questionnaire used in a vast majority of household surveys. The TCM collects information on the inhabitants of a dwelling, such as their family relationships, the type of dwelling they are occupying, their occupation(s), their nationality/ies, their educational attainment, their income, etc.
Launched in the early 1990s, it became computer-based (CAPI) in 2004 for cross-sectional face-to-face household surveys. In 2017, it was re-designed to accommodate both cross-sectional and longitudinal surveys. [2]