A City Guide To Zhanjiang for free enterprise: a system that allows demanders and suppliers to freely exchange goods, services, and financial assets without government intervention. free rider: an individual who can consume a good and avoid having to compensate the seller. Free riders may arise during the provision of public goods. free trade: when countries engage in international trade, exchanging goods and services, but without the existence of trade barriers like quotas and tariffs. game theory: a formal approach to analyzing strategic behavior. gold standard: an international monetary system that allows a nation’s currency to be exchanged for gold. government expenditure: the overall expenditure by (some combination of) the various levels of government. A City Guide To Zhanjiang 2016.