Source : http://qje.oxfordjournals.org/

            2000 by the President and Fellows of Harvard College and the Massachusetts Institute of Technology.
            The Quarterly Journal of Economics, August 2000

We combine two experiments and a survey to measure trust and trustworthiness—
two key components of social capital. Standard attitudinal survey questions
about trust predict trustworthy behavior in our experiments much better than they
predict trusting behavior. Trusting behavior in the experiments is predicted by
past trusting behavior outside of the experiments. When individuals are closer
socially, both trust and trustworthiness rise. Trustworthiness declines when
partners are of different races or nationalities. High status individuals are able to
elicit more trustworthiness in others.