1 An Experiment of Public Goods Provision through Prisoner's Dilemma Game: are Students Homo economicus? Bambang Suprayitno Universitas Negeri Yogyakarta bambang_s@uny.ac.id Tejo Nurseto Universitas Negeri Yogyakarta tejo@uny.ac.id Ngadiyono Universitas Negeri Yogyakarta ngadiyonoadi@gmail.com ABSTRACT A provision of public goods risks free-rider problem because of one of its properties, non excludability. The property allows noone to exclude anyone to consume the goods. Therefore, it will threaten the availability of the public good itself. Purpose of this study is to determine the economic behavior of community members. Other than that, it aims to know the differences in the economic behavior men and women the provision. It also explores behavioral changes that occur when a tranparancy and grouping rule are carried out. This research was conducted through an experiment of the provision of public goods utilizing the Prisoner's Dilemma game scenarios. The game was applied for three sessions, where each session consisted of 16 rounds that everyround had unique payoff table. Session I, each participant didn’t know whom he paired with. Session II, the participants were allowed to know his couple and can negotiated each other. Session III, the participant acted as a member of a group. This experiment was conducted by students in three classes and 32 students per class. The result shows dominance homo economicus behavior. It is only 21% of participant couples to choose donation, the contribution rate is lower than the previous studies. There is no significant difference between men and women. When the rules of transparency applied the rule, it increases significantly the role of the community in making a donation in the provision of public goods compared it in session I. Keywords: public goods, the prisoner's dilemma, experiment INTRODUCTION Public goods are one kind of goods that are certainly not proper to prohibit any person to use or obtain the benefits of them (Rosen&Gayer, 2008; Hyman, 2008). Because of property of nonexcludability, it has no exclusivity. Therefore anyone can utilize the goods even he is unable or unwilling to pay. In line with the property, the risk of problem arises, namely the free-rider problem, the problem emerges when there are