Long-term unemployment is a category for political action and not a th
eoretical notion. Nevertheless, taking into account the actual length
of unemployment has led to important theoretical adjustments in our re
flection on the job market. Analysing long-term unemployment as a comp
lex social and economic universe means that the reference basis of aut
omatic adjustment between job supply and demand based on a price on a
price balance, or salary, is questioned, and results in the importance
being granted to the actors and regulations which give the structure
to these already-constructed systems: strategies for the umemployed to
remain on the job market and to fight against losing their qualificat
ions; institutional interventions by public services in employment, vi
a benefit management or the structuring of the job market; the role of
intermediaries in activating the systems of qualification and employm
ent procedures working with job supply and demand. These social and in
stitutional dimensional thus appear to be the main organisers of the j
ob market.