摘要：Determining when range cows should be culled and replaced is one of the most important decision problems faced by ranchers (Frasier and Pfeiffer). Related to the culling decision is the value of pregnancy testing. Tronstad and Gum found that under some market and age conditions, open cows should be kept and pregnant cows culled. These results indicate that pregnancy testing doesn’t always have economic merit. The primary objective of this paper is to quantify the immediate one-period and long-run returns to pregnancy testing.
