The causes of the expansion and cross-national variation in the provision o
f welfare state goods and services are examined. Social democratic governan
ce is by far the most important determinant of the public delivery of servi
ces and is one of the most important determinants of the public funding of
the provision of welfare state goods and services. Christian democratic gov
ernance is an important determinant of public funding of services, but is n
ot related to public delivery. State structure is also an important determi
nant. Women's labor force participation is an important determinant of the
expansion of public social welfare services net of other social, political,
and historical factors. The analysis also shows an interactive effect of w
omen's labor force participation and social democratic governance on public
delivery of welfare state services. We conclude that public delivery of a
wide range of welfare state services is the most distinctive feature of the
social democratic welfare state and that this feature is a product of the
direct and interactive effects of social democracy and women's mobilization
.