Four trends in the past decade have significantly influenced the landscape of global marketing. One of them is an increase in economic protectionism and a decline in free trade. a more aggressive attitude towards initiating international tariffs and quota systems. global competition among global companies for global customers. a decrease in most countries' GDPs and a renewal of nationalism. an increase in most countries' GDPs coupled with an increased degree of consumer ethnocentrism. Tariffs refer to government payments to companies or industries that primarily serve to create competitive advantage for domestic products. government taxes on products or services entering a country that primarily serve to raise prices on imports. a restriction placed on the amount of a product allowed to enter or leave a country. a minimum requirement for the purchase between two or more nations of products or services. a refusal to purchase or exchange products or services with another nation