States may need to intervene in international trade for economic, political and social reasons. In this study, the effects of tariffs on international trade were investigated by using statistical techniques. According to the test results, the average of trade openness for countries with medium and high tariff complexity is equal. On the other hand, for countries with low tariff complexity, the average of trade openness score is statistically higher than those with a commercially clear score of middle and high tariff complexity. As a result, it can be concluded that the level of complexity of tariffs adversely affects trade openness, which should be taken into account when designing international trade policy.

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