ソーシャル・キャピタル
[[Social capital]] is a concept built from the premise that some value emanates from [[social networking]] sites due to the social interaction which may have positive influence in the society of the individuals who belong to the group by facilitating coordinated actions (Putnam et al., 1993). Simply put, social capital is “the ability of people to work together for some common purpose” (Rosenfeld, 1997). Trust, rules, norms and networks create social capital (Barr, 2000), Narayan (1997).