Tariff
In contrast, in economic theory tariffs are viewed as a primary element in international trade with the function of the tariff being to influence the flow of trade by lowering or raising the price of targeted goods to create what amounts to an artificial competitive advantage. When tariffs are viewed and used in this fashion, they are addressing the country's and the competitors' respective economic healths in terms of maximizing or minimizing revenue flow rather than in terms of the ability to generate and maintain a competitive advantage which is the source of the revenue. As a result, the impact of the tariffs on the economic health of the country are at best minimal but often are counter-productive.
Supply management (Canada)
A tariff-rate quota (TRQ) is an international trade policy tool that combines import quotas and tariffs. By 2013, there were approximately 1200 WTO TRQs in the agricultural sector annually among supplying countries under GATT Article XIII. TRQs are a result of the "current market access requirements" and the "minimum market access requirements" forming the basis of the "Uruguay Round country schedules for agriculture." TRQs are two-tiered tariffs in which quotas of certain sensitive domestic products are assigned a quantitative threshold or WTO "minimum access commitments" for imports during a designated time period. Tariffs for imports that are at or below the threshold, are either nonexistent or very low. Imports above the quantitative threshold, are much higher, making the cost of importation intentionally prohibitive. Once imports exceed the "minimum access commitments" as required by the World Trade Organization (WTO), which allow for imports at no or lower tariffs, in Canada imports face prohibitive tariffs such as 168% for eggs, 285% for chicken, 246% for cheese and over 300% for butter. These steep tariffs have been often cited to criticize SM for creating barriers to free trade and artificially raising prices by SM critics such as David E. Bond (2010), Andrew Coyne (2011), Hall Findlay (2012) and President Trump in 2016.