Unanticipated gains : origins of network inequality in everyday life / Mario Luis Small.

Social capital and organizational embeddedness
Childcare centers and mothers' well-being : whether mothers did better when their children were in daycare
Opportunities and inducements : why mothers so often made friends in centers
Weak and strong ties : whether mothers made close friends, acquaintances, or something else
Trust and obligations : why some mothers' support networks were larger than their friendship networks
Ties to other organizations : why mothers' most useful ties were not always social
Organizational ties and neighborhood effects : how mothers' nonsocial ties were affected by location
Extensions and implications.