Using “Big-Five” personality traits that can be easily applied to AI (Artificial Intelligence) machine learning and “Egogram” that represents the status of ego widely used in medical and educational fields, the purpose of this research is to design a marketing framework to stimulate buying behavior of English language learners. The student group qualitatively verifies the correlation between the characteristics of the learner and the words that motivate the learner's English learning and purchasing behavior, and build the necessary hypothesis model for future quantitative research, analysis, and verification such as statistical methods.

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In this paper, we build and analyze a model of strategic trade policy in which domestic and foreign companies are engaged in Cournot competition in a third country market, based on consumer goods that have endogenous durability. It drew the following results that differ from previous studies. Firstly, neither domestic nor foreign companies conduct production in the first phase. Secondly, an increase in the subsidies provided by their own government leads to a decrease in the durability of their own country’s consumer goods. Even if subsidies by foreign governments change, this will not affect the durability of their own country’s consumer goods. Thirdly, the subsidies by their own government increase or decrease economic welfare depending on the parameters.

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