Probably the best measure of corruption is the World Bank’s Control of Corruption Indicator, which has been published since 1996 for over 180 countries. The CCI shows that while rich countries tend to be less corrupt than poor ones, countries that are relatively less corrupt, for their level of development, such as Ghana, Costa Rica, or Denmark, do not grow any faster than others.
用数据说话。最好的腐败指标或许是世界银行的腐败控制指标（CCI）。该指标1996年开始发布，涵盖了180多个国家。CCI表明，富国的腐败情况比穷国少，但相对腐败更少的国家，比如加纳、哥斯达黎加和丹麦，并不比发展水平相当的国家增长更快。