The Effects of Breeding Stock Productivity on the U.S. Beef Cattle Cycle
用计量方法估计了繁殖群生产率对美国肉牛周期的影响，发现生产率增长使肉牛存栏量在长期内减少0.5%至2.5%，并降低了供给弹性。
Abstract The effects of breeding stock productivity on the U.S. beef cattle cycle were econometrically estimated. Growth in output per beef cow was hypothesized to impact inventory response via cattle prices and marketing alternatives. Beef productivity included carcass weights of steers, heifers, and cull cows but excluded carcass weights of dairy cattle and cattle imports. Results indicate that from ten years to an equilibrium period, the beef cow herd averaged 0.5% to 2.5% smaller compared to if zero productivity growth had occurred. In addition, productivity growth decreased the inventory elasticity of supply by 18% between 1960–74 and 1975–96.