Empirical Investigation of Beef Gain Roughage‐Concentrate Substitution
利用两个牛肉饲养实验数据，估计生产函数并推导等产量线，发现粗饲料与精饲料的等产量线并非严格凸向原点，且使用己烯雌酚的阉牛数据中非凸区域更明显。
Abstract The shape of the beef gain roughage‐concentrate isoquant is examined. Data from two beef‐feeding experiments designed to investigate response from alternative combinations of roughage and concentrate are utilized. Isoquants derived from estimated production functions are compared with directly estimated isoquants. The estimates indicate that the isoquant is not strictly convex to the origin. The nonconvex region is more pronounced in estimates obtained from data of steers fed diethylstilbestrol.