Agricultural policy in an uncertain world
回顾当前粮食状况及历史演变，分析农业生产力、外部性和不确定性对农业部门效率的影响，并讨论对农场管理和农业政策的启示。
This paper briefly reviews the current food situation and provides some historical perspectives on its evolution over time. It documents the important effects of agricultural productivity. It also evaluates the role of externalities, uncertainty and policy in the agricultural sector. The analysis stresses the joint role of uncertainty and externalities in the analysis of efficiency issues in the agricultural sector. Implications for farm management and agricultural policy are discussed.