We evaluate how the share of farmland enrolled in agri-environmental schemes affects the biodiversity friendliness of management practices both on the overall farmland as well as on the enrolled and non-enrolled plots separately. To this end, we prepare a unique dataset for Switzerland that links farm-level accountancy data to plot-level data on management practices and their impact on organismal biodiversity. Our estimates allow us to calculate bounds for potential spillovers on non-enrolled farmland. We find that these are positive but small in magnitude. The effect on the overall farmland is also positive but again rather small.

中文翻译：

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参与生物多样性计划和环境绩效：农场层面的总体影响和对未注册土地的溢出效应


我们评估了参加农业环境计划的农田份额如何影响整个农田以及已登记和未登记的地块管理实践的生物多样性友好性。为此，我们为瑞士准备了一个独特的数据集，将农场级会计数据与有关管理实践及其对生物生物多样性影响的地块级数据联系起来。我们的估计值使我们能够计算未登记农田的潜在溢出的界限。我们发现这些是正的，但幅度很小。对整体农田的影响也是积极的，但同样相当小。