Ex post analysis of the crop diversification measure of CAP greening in France
利用法国农户土地数据，通过断点回归双重差分法，评估了2013年共同农业政策绿色化改革中作物多样化措施的效果，发现30公顷以上农场合规性提高，大小农场反应不同。
Abstract In this article, we quantify the impact of the crop diversification measure implemented in France as part of the 2013 common agricultural policy greening reform. We exploit a discontinuity in the constraints imposed on farms larger and smaller than 30 ha, respectively, and apply regression differences-in-differences with a regression discontinuity set-up on land use data collected from a representative sample of French farmers. We find that farms greater than 30 ha increased compliance with the measure and the number of crops grown on their lands and that farms larger and smaller than 30 ha responded differently to the reform.