The strategy combination of single sourcing and long‐term contracts is rapidly becoming the norm in progressive purchasing functions. The implications of this radical development is examined by disentangling the advantages and disadvantages of the separate strategies before recombining them to...

Feed represents the largest cost input in intensive catfish Ictalurus punctatus production. Daily feed rations are generally related to stocking densities, up to a point at which high feeding rates begin to affect water quality. There has been no prior research to analyze the economic...