An area response model for perennial plants and its application to Spanish oranges and mandarins
提出了一个多年生植物的面积响应模型，结合产能利用和预期利润投资理论，通过单一加总方程估计种植和移除的净效应，并应用于西班牙五种橙子和柑橘品种的面积数据，结果与预期一致且统计表现良好。
In this article, an area response model for perennial plants is presented. The capacity utilization and the expected profit investment theories have been jointly used to provide the theoretical framework. The net effect of plantings and removals are estimated through a single aggregate equation. The model was applied empirically to the area of 5 orange and mandarin varietal groups in Spain, namely, Satsuma, Clementine, Navel, Blood Orange and Late Orange. Results show a high consistency of signs with a priori expectations and acceptable statistical performance.