Supply response and input demand of Dutch dairy farms
利用荷兰奶牛场的不完整面板数据，估计了要素需求与产出供给系统，通过Hausman检验比较固定效应与随机效应模型，发现固定效应模型更优。
A system of factor demand and output supply is estimated using an incomplete panel of Dutch dairy farms. The intercepts of the two equations vary over the farms, reflecting differences in quality of labour and land. Comparison of fixed effects estimates and random effects estimates using a Hausman test favours the fixed effects model.