Showing posts from January, 2013

Data-Driven Bull Buying

There are lots of ways to make a decision. We can act on our impressions or intuitions. Or, we can gather data and let the evidence guide our decisions. I call this a data-driven philosophy. This week, Amanda Radke and  Kris Ringwall gave their perspectives on a data-driven bull purchase. Both are great articles that I encourage you to check out. Here is my take—we need to make our decisions on a single metric that takes all available information into consideration. These metrics are expected progeny differences (EPDs) and economic indexes. EPDs combine performance records, information from relatives, information from correlated traits, and—in the case of genomic-enhanced EPDs—results from DNA tests. EPDs are the most accurate measure for a particular trait of the bull's merit as a sire. Economic indexes combine multiple EPDs and economic values of each trait to create a single measure of the bull's merit for increasing a producer's profit. We should not be selecting