The effect of result‐based agri‐environmental payments on biodiversity: Evidence from Switzerland
利用瑞士20年植物物种调查数据，采用断点回归方法，发现基于结果的农业环境支付增加显著提升了接近支付资格地块的生物多样性，但对已达标地块无显著影响。
Abstract We estimate the effects of result‐based agri‐environmental payments on biodiversity using a unique dataset containing information about plant vegetation. The data include information on surveyed plant species for a large number of randomly selected plots followed over a period of 20 years in Switzerland. In our estimation, we utilize a difference‐in‐discontinuities approach based on exogenous variation in payments triggered by (i) a policy reform in Switzerland that led to a considerable increase in payments that was uncertain prior to the implementation and (ii) an administrative threshold of reform that defines eligibility for payment depending on the botanical quality. We find that the increase in result‐based payments led to an increase in the biodiversity of plots that were almost eligible for the payments before the reform but not for plots that already satisfied the eligibility criteria. Our findings have important implications for the design of result‐based payments.