Social Capital and Regional Economic Growth
The authors study a cross-section of 54 European regions in the period 1950-1998. The central question is whether social capital, in the form of generalized trust and associational activity, is related to regional differences in economic growth. Their analysis suggests that it is not only the mere existence of network relationships that stimulates regional economic growth, but also the level of actual involvement in these relationships.
Link
http://greywww.kub.nl:2080/greyfiles/center/2001/doc/102.pdf