This project is designed to assess whether a new prison survey is needed now, more than ten years after the HID-prisons survey and the extension of the survey among prisoners about their family situations. It will start by making an inventory of the statistics available in France on the country's prison population (including those on parole or day parole). Alongside this work the researchers will update knowledge on questions about the prison population for which robust statistical information is wanted. At this stage all fields will be addressed: living conditions, activities, family situation and relationships, heath and access to health care, resources, reintegration, etc.). A comparison between the two inventories will reveal the gaps in the existing setup. The project will also assess the human resources available for organising and exploiting a hypothetical new prison survey.