Cool article - though I have to wonder how they measure team performance, given that it is our all important response variable.<p>In modern animal breeding, our goal is typically to improve some trait through genetic means. We extract the animal&#x27;s DNA, sequence it, and compare it across many different families in order to evaluate how that individual differs from others and how its genetics affects our trait of interest. We call this trait our &#x27;phenotype&#x27;, and in animal breeding, phenotype is king. We can do all of the analysis we want, but if our phenotype is inaccurately measured or uninformative, it&#x27;s all a waste of time.