Comparative advantage is the ability to produce a good at a lower opportunity cost than another producer (Mankiw & Gregory, 2012). This provides a net gain in terms of economic well-being for the producing country. There are many advantages to this aspect of free trade, such as lower production costs. For example, imposing strict regulations on the production of goods can leave domestic producers at an unfair disadvantage, leading to possible price increases due to production costs. New Zealand is an efficient producer of (has a comparative advantage in) a range of products subject to some of the highest trade barriers in the world (NZIBF, 2015). The removal of tariff barriers as a result of free trade can lead to lower prices