Farm Level Costs of Agri‐environment Measures: The Impact of Entry Level Stewardship on Cereal Farm Incomes
采用双重差分与倾向得分匹配法，研究英国东部谷物农场参与入门级管理计划对收入的影响，发现该计划可能降低总收入但补偿基本合理。
Abstract Applying a difference‐in‐difference approach with propensity score matching, we examine the impact of participation in the Entry Level Stewardship ( ELS ) scheme on cereal farm incomes in eastern England. We assess the extent to which impacts are related to a) the source of income affected – whether only from agricultural or total business income; b) the channel of the impact – through land use and/or labour input; and c) the level of impacts through time. In addition, we assess the appropriateness of the level of the ELS payment. We find that: a) entering the ELS scheme could negatively affect cereal farm incomes – in particular, the total business income; b) that negative impacts arise primarily in relation to the use of land resources; c) that impacts may diminish over a relatively short period of time; and d) that the ELS payment broadly compensates for losses without providing over compensation. Given the diminishing negative impact over time, the level of ELS payment might need to be reviewed in the longer term, although policy evaluation should consider the wider implications for efficiency of alternative payment levels. We also discuss some limitations of the approach and potential extensions.