Sacrifice Ratio is dollar cost of production loss divided by %
change in inflation. 
Eh?
From Understanding the Wealth of Nations (Miles &
Scott):
From the Phillips curve, we have that every 1% increase in
unemployment produces an A% decline in inflation. Therefore, to
reduce inflation by 1% we need to increase unemployment by (1/A)%
-- this is called the sacrifice ratio, how much unemployment needs
to be generated to lower inflation by 1%.
