In this study we analyse the impact of the EU Airport Charges Directive on the level of aeronautical charges for EU airports serving between 2 and 20 million passengers, over the period 2008–2017, using a difference-in-differences research design. We find that the transposition of the Airport Charges Directive into national legislation has led to a statistically significant reduction in the level of airport charges, but only after a few years. We also find the existence of heterogeneous treatment effects that depend on the quality of transposition of the Directive.

中文翻译：

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欧盟机场收费指令是否降低了航空收费？差异研究设计中的经验证据

在这项研究中，我们使用差异研究设计来分析欧盟机场收费指令对在2008-2017年间服务于2至2000万旅客的欧盟机场的航空收费水平的影响。我们发现，将机场收费指令转换为国家法规已经导致了机场收费水平的统计显着降低，但仅在几年之后。我们还发现取决于指令转置质量的异质处理效果的存在。