防范政企合谋的实验研究和机制设计
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摘要
我国正处于转型经济时期,官商勾结型利益集团的形成和发展成为中国市场经济发展的毒瘤。但是由于政企合谋的隐蔽性和复杂性,难以开展实证研究。本文采用实验经济学的研究方法,招募本科生作为被试者,以现金和课程分数作为激励,在实验中模拟政府官员与企业的行为,观察他们形成合谋的动态轨迹。本文在第一个实验中以官员薪水和监督概率作为核心变量,实验结果发现,监督才是有效防范政企合谋的元素;提高官员薪水反而引起企业更剧烈的寻租,并在互惠驱动下导致官员更多地与企业达成合谋。因此,防范机制的设计应当采取约束取向,而非激励取向。本文在第二个实验中,引入不对称处罚机制,基本思想是:在企业主动寻租的情况下,对行贿的处罚从重,而对受贿的处罚从轻;在官员主动设租的情况下,对官员索贿的处罚从重,而对企业接受了非法回报的处罚则从轻。实验结果发现,受贿豁免机制最有效,能够显著减少企业贿赂和官员腐败;被索贿豁免机制的效果有限,只能减少官员索贿数额,却不能减少合谋达成率;行贿豁免机制则有负效应,引起更高的贿赂与合谋率。结合两个实验研究的结论,本文提出,防范政企合谋的最优机制设计应当采取约束取向,对合谋行为产生威慑;同时采用不对称处罚机制,打破合谋同盟的互惠与信任。
The market system in China’s transitional economy is not mature. Collusion and illegal exchange between government officials and enterpriser harm market economy and social welfare. Although the negative effects are realized, empirical research is hindered by a notorious lack of data. Therefore, I use laboratory experiments to investigate the collusion behavior between officials and enterprisers. I recruit undergraduate students as subjects; and I use course score and cash as rewards. In the first experiment, I conduct four treatments by using official wage and detection probability as focus variables. The result shows that detection is the key element of preventing collusion. High detection significantly reduces bribery and corruption, while high wage drives more bribery and reciprocal exchange. In the second experiment, I carry out three treatments to test the design of asymmetric penalties and leniency. The result approves that bribe-takers should be less penalized for taking and more for extorting. Likewise, bribe-givers should be more penalized. Collusion can be prevented by offering leniency to officials who take bribe and to enterprisers who are extorted to bribe. Combining the results of two experiments, I suggest that the optimal prevention mechanism be constraint-orientation, not incentive-orientation, with high detection probability, and adopt asymmetric penalties to break down reciprocity and trust.
引文
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