Data Sources
Potentially relevant experiments were identified through searches of
EconLit, the Internet Documents in Economics Access Service (IDEAS), and
a survey article.
Review Methods
A total of 349 potentially relevant studies were identified.
Of these, 27 (representing a total of 711 groups of participants) met the
inclusion criteria. Data were abstracted from these studies using
a standardized protocol. Results were analyzed using weighted ordinary
least squares. Average group efficiency was the dependent variable.
Results
The marginal per capita return, communication, constant group composition
over the session (“partners”), positive framing, and the use of children
as subjects had a positive and significant effect (p<0.05) on the average
level of contribution to the public good. Heterogeneous endowments
to subjects, experienced participants, and soliciting subjects’ beliefs
regarding other participants’ behaviour prior to the start of the session/period
had a negative and significant effect. A number of other factors
were not identified as significant.
Conclusion
The meta-analysis results parallel several key findings from previous
literature reviews. In addition, they offer parameter estimates and
an analysis of significance based on the totality of the available research
evidence. More consistent reporting of the results of experiments
would greatly improve the ability to conduct this type of research.
Keywords: Public Goods, Voluntary Contribution, Experiment
JEL Categories: H41, C70, C9, B40
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