Punctual or aperiodic

The "Facility" component of the project has been carried out in spring 2024, while the "Individual" component has been carried out one year later, in spring 2025, over a 3-months period between April and July (no collection on Sundays).

This represents a change from the two previous editions, which took place in winter. The decision to postpone until spring was made in consultation with stakeholders involved in combating homelessness. It offers several advantages, notably the availability of more investigators and more favorable conditions for conducting street interviews than in winter.

In addition, the year 2025 was chosen to coordinate with the ES-DS survey, the next wave of which will take place at the same time and can therefore be used to calibrate the results.

Face to face by interviewer

A three-stage sample design has been realized. We have no sampling frame for the homeless population. The method used therefore consists in drawing individuals from a set of services they use, or services they "consume".

For the purposes of the survey, the services offered by the main services used by homeless people are selected: accommodation, meal distribution, and (depending on the results of the tests to be carried out) outreach services (maraudes) and day centers. Services are therefore the statistical units sampled. A service is defined by three parameters: its content (overnight stay, meal, reception), and the day and time at which it is consumed. As it would be difficult to list all the services consumed throughout the country during the reference period, services will be selected on the basis of a three-stage random draw: a certain number of agglomerations exceeding the threshold of 5,000 inhabitants, then a certain number of facilities in these agglomerations, and finally a certain number of services in these facilities.

15 000