mately half as important as protein yield, with the
REV for body size being negative. Fat and milk yield
were approximately equally important as each other
and 40% as important as protein yield. Milk (volume)
yield had a negative REV. Milk protein can be
expected to be worth more than fat or milk volume
where there is decreased demand for fluid milk and
increased consumption of cheese and export of dairy
products. REVs were fairly robust to changes in herd
parameters, implying that they can be used