@article{Knack1997,
author = {Knack, S. and Keefer, P.},
title= {Does social capital have an economic payoff? Across-country investigation},
year = {1997},
doi = {10.1162/003355300555475},
journal = {The Quarterly Journal of Economics},
volume = {112},
number = {4},
pages = {1251--1288},
}