“…In equation (1), the i th animal's output price, p i ( M ( t ), H i ( t )) ∈ P , is derived from a vector of market variables, M ( t ), and a vector of hedonic value adjustments, H i ( t ) (e.g., perceived carcass quality, age, and weight within a preferred range). Whereas it is largely accepted that fed cattle prices generally follow seasonal patterns (Anderson and Trapp, 2000), we assume that market variables are independent of the producer's short-run market timing decision and take the buyer's hedonic value adjustments as given. The animal's weight, , at any moment during the production process is a function of time, conditional on a vector of exogenous, intrinsic, and heterogeneous biological parameters, (e.g., the animal's genetic makeup and weather).…”