doi:10.1017/S1751731117003007, published by Cambridge University Press, 16 November 2017
During the production process an error was introduced into the equation shown within the profit function section of the article. The correct representation of the equation is as follows;
Profit=Revenues–Expenses
Revenues=number of ewes×[fertility×((milk yield×milk price)+(prolificacy×lamb price))–lamb price/longevity+price for culled ewes/longevity]
The publisher apologizes for the error.