@conference {40322,
	title = {Are yearling heifer mating and more productive beef cow breeds a worthwhile use of winter feed?},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {51},
	year = {1991},
	month = {Jan},
	pages = {265-270},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {A computer software package (REVGAIN) is being developed to  integrate closely with Animalplan. It assists breeders and their  advisers to derive relative economic values and selection criteria to  suit their breeding programme.   For farmers buying flock rams REVGAIN derives relative economic values  for their individual commercial flock, and hence the sort of breeder  from which to buy rams.   Using specific production levels, prices, and costs for the producers{\textquoteright}  or breeders{\textquoteright} situation, together with the corresponding Animalplan  phenotypic and genetic parameters, the software calculates relative  economic values that will lead to maximum economic progress in the  breeding goal. It also estimates the change in each character that will  occur from a standard amount of index selection. By comparing different  economic outcomes from changing product prices, physical inputs or  genetic responses, users derive the policy that is most appropriate to  their particular situation.  },
	issn = {1176-5283},
	author = {McMillan WH and McCall DG}
}
