Social Capital: One or Many? Definition and Measurement
讨论了社会资本的三个概念家族（信任、合作便利性、网络），用博弈论语言将其定义为囚徒困境中合作解的超额倾向，并比较了不同定义对应的测量方法，探讨这些方法是否指向同一个潜在变量。
Three families of social capital concepts are discussed: (fa1) trust, (fa2) ease of cooperation, and (fa3) network. In the language of game theory, social capital is the excess propensity to play cooperative solutions in prisoners’ dilemma games. The three families lead to different definitions, and thus to different measurement methods. Some measures are theory‐near, while others are easy‐to‐use proxies. It is shown that all definitions and measures are related. The ‘social capital dream’ is that all definitions try to catch aspects of the same phenomenon, so that all measures tap the same latent variable. It is discussed whether this dream is likely to come true.