 Free trade is a trade policy that does not restrict imports or exports, it is the idea of the free market has applied to international trade. In government, free trade is predominantly advocated by political parties that hold right-wing or liberal economic positions, while economically left-wing political parties generally support protectionism, the opposite of free trade. Both nations are today members of the World Trade Organization WDO Multilateral Trade Agreements. Free trade is additionally exemplified by the European Economic Area and the Mercosor, which have established open markets. However, most governments still impose some protectionist policies that are intended to support local employment, such as applying tariffs to imports or subsidies to exports. Governments may also restrict free trade to limit exports of natural resources. Other barriers that may hinder trade include import quotas, taxes, and non-tariff barriers, such as regulatory legislation. There is a broad consensus among economists that protectionism has a negative effect on economic growth and economic welfare, while free trade and the reduction of trade barriers has a positive effect on economic growth. However, liberalization of trade can cause significant and unequally distributed losses, and the economic dislocation of workers in import competing sectors.