Estimating crop supply response in the presence of farm programmes: application to the CAP
提出一个分析框架，用于估计共同农业政策中价格削减、补偿支付和土地休耕计划对作物种植面积、供给和产量的影响，对研究农业政策效果的学者有用。
This paper proposes an analytical framework allowing estimation of the effects of the new instrumentation of the CAP in the arable crop sector--price cuts, compensatory payments and land set-aside schemes--on crop acreage allocations, supplies and yields. Duality theory is used to model crop supply response in the presence of voluntary acreage control programmes and direct aids per hectare to producers. The definition of a profit function where total land is fixed but allocatable to the various crops allows us to obtain, via the envelope theorem, output and variable input equations, which can be used with the first-order conditions for an optimal land allocation as a basis for comparative statics analysis of the three main instruments of the CAP. Copyright 1996 by Oxford University Press.