An Experimental Evaluation of Weakest Link/Best Shot Models of Public Goods
通过实验检验了三种社会合成函数（标准加总、最弱链接、最佳射击）对公共品供给中搭便车行为的影响，发现最弱链接型函数下搭便车最少，最佳射击型最多，且实验结果与理论预测高度一致。
In the supply of public goods, far less free riding actually occurs than traditional theory predicts. As one explanation, the social composition function, which aggregates individual contributions into an available social total, may not always take the standard summation form. Theoretical considerations indicate that free riding should be least for a social composition function of the weakest-link type but greatest for the best-shot type. Using a sequential protocol, the authors' experiments strongly confirm theoretical anticipations under all three types of social composition functions. Even under the more onerous sealed-bid (simultaneous play ) protocol, the experimental subjects are able to make some partial progress toward the theoretical ideal. Copyright 1989 by University of Chicago Press.