... across the four countries, though gains in the US and New Zealand have been the lowest. In New Zealand, the continued use of low input farming limits some of the gains that have been made from ... from formulating and feeding of concentrated rations. The presence of quota in Canada and the EU-15 does not appear to slow the growth in production per cow in the long-run. In the short-run ... farms in the countries examined. In fact, the percentage declines in the US, EU-15, and Canada have been nearly identical from 1992 to 2009. New Zealand, the country with the least government intervention,...