Technology heterogeneity and policy change in farm-level efficiency analysis: an application to the Irish beef sector
以爱尔兰牛肉养殖为例，评估技术异质性对分析政策变化影响技术效率的后果，发现单一前沿模型会高估技术无效率，且2003年共同农业政策改革对不同技术类型农场效率影响不同。
This paper assesses the consequences of technological heterogeneity when analysing the effects of policy changes on technical efficiency, using Irish beef farming as a case study. A latent class stochastic frontier model is estimated. Results suggest that a single frontier model overestimates technical inefficiency compared to the model where technology heterogeneity is accounted for. The paper also evaluates factors that influence technical efficiency, particularly the impacts of the 2003 reform of the Common Agricultural Policy. Results indicate that the introduction of decoupled payments had significant positive effects on efficiency of farms operating under only two of the three identified technologies.