Theoretical analysis applied game theory model and correlate analysis to verify conclusions about the influence of its variation on industrial concentration and product differentiation . conclusions of this paper : nominal tariff rates show negative correlations with industrial concentration whereas non - tariff barriers show positive correlations ; increase of non - tariff barriers will enlarge the differences between imported and native goods in a short period and the mentioned differences may be erased by technological advance made by import nations in a long time 最终结论：名义关税税率变动与产业集中度变动呈现负相关关系；非关税壁垒变动与产业集中度变动呈现正相关关系；非关税壁垒的增高会在短期内加大进口品与国产品的差异程度；如果长期内非关税壁垒不发生变化，差异程度将趋于消失，消失的过程表现为出口国对技术壁垒的跨越和产品差异与国外的趋同。
Example : the strategy of technology standards and other non - tariff barriers emerges from a fundamental reality of chinese technology development : china ' s basic innovative capacity has improved in step with its involvement in the international economy , but chinese companies remain followers , not leaders , in developing new technologies 例证:技术标准和其他非关税壁垒的策略，来自中国技术发展的一个基本事实：中国的基础创新能力与它参与世界经济的程度正同步增强，但在开发新技术方面，中国公司仍是一个跟随者，而不是领导者。
Following the expansion of international trade and the development of economic globalizing , most nations and regions have been more and more concerned with effected measures to protect home producers , to protect an important or influential domestic industries , to protect domestic infant industries 经济全球化已成为不可逆转的经济发展大潮，世界各国、各地区在激烈的国际竞争中，在遵循世界贸易组织规则，不断降低关税、取消非关税壁垒的同时，均欲努力寻求保护国内产业健康发展的各种途径。
