For a long time, urban research sought to prove its independence from
the government. This is no longer the problem. Increasing demands for
research and the involvement of researchers in both concrete operation
s and general debates favor independence; but these factors also carry
risks. Places should be developed where ''cumulativities'' can be man
aged and scientific debates, organized. Posed between field work and t
heory, as well as between disciplines, urban research can be a source
of scientific progress.