腐败惩罚的边际递减及地区差异:基于腐败金额的实证分析

An Empirical Analysis of the Diminishing Marginal Punishment and Regional Difference Based on the Amount of Corrupt Monies

基于2014年中国法院公布的受贿罪一审判决文书,实证探讨腐败金额对惩罚力度的影响。使用法院对受贿罪的判刑时间作为腐败惩罚力度的衡量指标,实证分析发现:腐败金额越多,判刑时间越长,但判刑增加的力度随着腐败金额的增加而减少,惩罚力度呈现出边际递减现象;同时,惩罚力度还呈现出地区差异,当腐败金额不断增加时,判刑增加的力度随着人均收入水平的增加而减少,东部地区比中西部地区判决更轻,但惩罚没有显著的城乡差异。要降低惩罚的边际递减影响,需提高惩罚概率、丰富惩罚类型、适度降低腐败金额与惩罚力度之间的关联。

Based on the first-instance bribery verdict published by the Chinese court in 2014, the paperempirically studies the influence of the amount of corrupt monies on corruption punishment in China. Usingthe court＇ s sentence length on bribery as a measure of the severity of corruption punishment, the paper＇ seconometric results indicate that the more the amount of corrupt monies is, the longer the prison time willbe, but the degree of sentencing increase reduces with the increase of amount of corrupt monies. Corruptionpunishment presents a diminishing marginal phenomenon. At the same time, the punishment also has region-al differences. When the amount of bribery increases, the increase of the prison time sentenced by the judgelessens with the increase of per capita income level, and the sentence is lighter in the eastern region than theMidwest. But the punishment has no significant differences between urban and rural areas. To reduce the di-minishing marginal effect of punishment, it is necessary to improve the probability of punishment, enrich thepunishment type, and moderately reduce the link between the amount of corrupt monies and the severity ofpunishment.