In 2016, the owner of a cow-calf operation must decide what the appropriate weight for cows in their herd is. For decades, the national trend has been for cow weights to increase because they produce larger calves, but evidence indicates that cow weights may have reached the point where the cost of maintaining a larger cow has become greater than the return from producing a larger calf. Analyzing this issue introduces marginal principles from economics. Formerly "Old Mule Farms," product no. 9B10B004.
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