This article considers the dynamic effects that the labour market has
on poverty and social exclusion.(1) It shows how the analysis of labou
r markets can help our understanding of social exclusion and reviews s
ome of the evidence from Europe and the United States. The evidence is
that there is considerable movement into and out of poverty. However,
there is a significant group who stay in poverty for a number of year
s and a group that experience repeated poverty spells. The data also s
how that labour market transitions are an import ant cause of movement
s into and out of poverty, although demographic factors are about equa
lly important. There are interesting similarities between the pattern
of movements into and out of unemployment and those for poverty: many
people leave unemployment quickly, but there are also important groups
who are unemployed for several years or who become unemployed repeate
dly. It is not only easily observable personal characteristics that ar
e relevant to determining an individual's Employment patterns: repeate
d periods of unemployment appear to result from 'unobserved heterogene
ity', rather than any damaging effect from earlier unemployment spells
. This finding raises the interesting possibility that the observed re
pented spells of poverty are also due to unmeasured personal character
istics.