In the 1990s the concept of social capital-defined here as the norms and ne
tworks that enable people to act collectively-enjoyed a remarkable rise to
prominence across all the social science disciplines. The authors trace the
evolution of social capital research as it pertains to economic developmen
t and identify four distinct approaches the research has taken: communitari
an, networks, institutional and synergy. The evidence suggests that of the
four, the synergy view, with its emphasis on incorporating different levels
and dimensions of social capital and its recognition of the positive and n
egative outcomes that social capital can generate, has the greatest empiric
al support and lends itself best to comprehensive and coherent policy presc
riptions. The authors argue that a significant virtue of the idea of and di
scourse on social capital is that it helps to bridge orthodox divides among
scholars, practitioners, and policymakers.