By Benjamin Feigenberg, Erica Field and Rohini Pande,; Harvard Kennedy School Working Paper no. RWP10- 019; available at: http://dash.harvard.edu/bitstream/handle/1/4449105/Feigenberg_BuildingSocial.pdf?sequence=1
Social capital, defined as “features of social organization, such as trust, norms and networks that can improve the efficiency of society by facilitating coordinated actions”, is built up as a result of repeated interpersonal interactions.